kaitai 4 days ago [-]
There's a huge ecosystem of open textbooks, and two of my favorite math sources the AIM textbook initiative and the UMN open texts library.

American Institute of Mathematics Open Textbook Initiative -- note that they review the texts too and are a bit picky about what they list: https://aimath.org/textbooks/

More than just math: University of Minnesota open textbook initiative. Stats, CS, and humanities as well: https://open.umn.edu/opentextbooks/

Not a repository, but an individual free/open math text under development -- comments and feedback desired: https://www.softcover.io/read/bf34ea25/math_for_finance It starts with elementary probability and then combines probability and stats with linear algebra, multivariable calculus, and differential equations. Aimed at folks who have seen the math before but need a refresher and a viewpoint that unifies seemingly disparate topics. Note that it uses Softcover, a great way to publish technical texts to several formats at once.

ipsum2 4 days ago [-]
To add to this, there's also American Math Society's free notes, some of which are basically full texts: https://www.ams.org/open-math-notes
craigching 4 days ago [-]
Thanks much for the links! I go to the University of Minnesota and didn't know about that one. Great to know my school supports open text books!
mindcrime 4 days ago [-]
Sadly, it seems that Professor Cain (the editor of this page) passed away in 2015[1]. The page had disappeared from the gatech.edu servers at one point, and I was afraid that without Professor Cain's presence, it might not ever be restored. Happy to see that it's online again.

[1]: http://obits.dignitymemorial.com/dignity-memorial/obituary.a...

elif 4 days ago [-]
When I was at GT, I had professors in 3 different departments who wrote free text books.

As a "budget" engineering/science school, I feel like it's part of the ethos.

zymhan 3 days ago [-]
As an out-of-state student, it's hard to see the "budget" approach GT had. However, I will say that many of my professors were well aware of the costs of textbooks, and rarely did it feel like we were required to buy ridiculously expensive books.

It also helps that the library checks out textbooks as well. I think they'll even obtain a copy of a textbook they don't have at the professor's request.

EDIT: Also, the the University System of Georgia has an exchange program that ships unique books between libraries in the state, though this isn't unique to Georgia.

abstrakraft 4 days ago [-]
Upperclassmen scared the bajeezus out of me when I got "Killer" Cain for calculus 3 my freshman year. The stories couldn't have been further from the truth - he was certainly tough, but also a fair, rigorous, and thorough teacher (if perhaps a bit impatient). I didn't realize he had passed...RIP, Dr. Cain.
wyldfire 3 days ago [-]
Preserved here [1] in case it makes sense.

[1] https://github.com/androm3da/math-textbooks

hesdeadjim 4 days ago [-]
This is awesome. At some point in the next five years I plan on taking a sabbatical and focusing almost exclusively on redoing my math education and moving deeper into advanced topics than I did as an undergraduate.

Is there anyone who has done something similar who might share some suggestions for success?

dmix 4 days ago [-]
A good entry point are one of these books which start from the very beginning of math in Egypt/Greece and teach the fundamentals of math through a narrative as humans discovered the various parts:

"Mathematics for the Nonmathematician" https://www.amazon.com/Mathematics-Nonmathematician-Morris-K...


"Mathematics for the Million" https://www.amazon.com/Mathematics-Million-Master-Magic-Numb...

Of the two I prefered Kline's book but they are both good, albeit a bit heavy on geometery as that was a big focus of early math research.

Another great starting point is "Book of Proofs" and "Introduction to Mathematical Reasoning" to give you a deeper sense of how to approach the subject.



From there I went down this path (the order of which is up to you, each has tons of good source material):

-> Proofs/Logic

-> Algebra

-> Linear Algebra

-> Calculus

-> Abstract Algebra

-> Set Theory

-> Group Theory

-> Category Theory

-> Statistics/Probability

-> Discrete Mathematics

I never did well with learning math in a classroom but I've grown to love math through this process. There are lots of applications in programming as well. It makes approaching the deeper parts of Haskell/FP, data science, and machine learning much more accessible. I particularly liked the higher level Abstract Algebra stuff over the more grinding equations of calculus/linear algebra as it was more similar to programming.

tnecniv 4 days ago [-]
> I particularly liked the higher level Abstract Algebra stuff over the more grinding equations of calculus/linear algebra as it was more similar to programming.

Linear Algebra Done Right takes a more abstract approach so there is minimal computational pain.

dmix 3 days ago [-]
Thanks, I'll check it out the book.

I prefer the more abstract stuff as I can do most of the computation via Sage (which is a great learning tool). Plus there are some amazing scientific calculator apps for Android and iOS these days which let you compose and calculate full complicated equations.

Of course it helps to work out equations to understand them but far too many math books push you towards rote memorization and test prep, meaning lots of exercises with endless equations, which is far from my goal here.

I'd say there is a market here for a math book/video series combined with Sage for teaching programmers and data scientists math. But there are so many math books already I'm afraid it would get lost in the noise.

jnbiche 4 days ago [-]
The author of Book of Proof referenced here also offers a free online Creative Commons-licensed version: http://www.people.vcu.edu/~rhammack/BookOfProof/

But the dead tree version is also very reasonably priced.

eyeball 4 days ago [-]
I so badly want to do this. I did pretty well in my undergrad math degree, making it through some grad level classes in logic and topology. Then I got a job in business.

Fast forward 15 years and I've forgotten so much that I look at old notebooks and can't understand a fucking thing I wrote back then.

It depresses me to no end.

And I kind of despair that with the obligations I'm locked into right now, it will be nearly impossible to dedicate the time I would need to relearn it all.

keithpeter 3 days ago [-]
Suggestion: Just try to sock away 1 hour a week. Select a topic that you remember being good at. Then just pick one chapter from one of the free books listed, and have at it.

The mind map in your head will start reconnecting fairly quickly I imagine.

I personally find the sheer quantity and range of these free pdfs daunting, so as a renegade physics graduate I'm focusing on Hammack's The Book of Proof this summer. As you did Maths at University, you might not need elementary stuff like that having already learned the strategies for abstract proof.

ivan_ah 4 days ago [-]
I have quite a few adult readers using my book to refresh and re-learn basic calculus and mechanics. You might consider checking it out[1]. It's not free, but very affordable.

[1] https://www.amazon.com/dp/0992001005/noBSguide preview: https://minireference.com/static/excerpts/noBSguide_v5_previ...

hesdeadjim 4 days ago [-]
Ha, this looks great, thanks. I have no problem paying for good content.
mianos 4 days ago [-]
I am the same, relearning a lot of linear algebra. It's a great book and my choice, so far, for this process. It does jump around a bit in some places but I have found, if something is not explained I keep on reading and some time later he comes back to it. Highly recommended.
nvarsj 4 days ago [-]
This book looks amazing! Exactly what I've been looking for as a refresher. Thanks.
rectang 4 days ago [-]
My suggestions would be to form study groups and seek out study partners. And if you are willing to take the lead when you meet, you'll learn more through (quasi-)teaching.

MOOCs and books provide the materials but not the motivation or the opportunities for synthesis through verbalization and interaction.

For what it's worth, I'm basically in the midst of a sabbatical in order to study math.

davty 4 days ago [-]
I'm having similar thoughts. I've started this journey by trying to complete all exercises on khanacademy.org.
s_kilk 4 days ago [-]
Same, I started at the pre-school math lessons and worked forward from there.

Progress is sporadic, due to having a newborn in the house, but patching all the holes in my math knowledge feels good.

mindcrime 4 days ago [-]
Likewise. I started with pre-algebra level stuff and I just login when I have some free time and watch more videos and do more exercises. I figure every time I jump on there and do some of it, I'm improving that foundation.

I've also been running through the series of Youtube videos on Calculus I by Professor Leonard. The plan is to go through his entire sequence (Calc I, II and III) and then move on to Linear Algebra (I've already been dabbling in that as well, mostly with the 3blue1brown videos).

It's not easy, but I think it's worth the effort to build up that math base. It increases the scope of things you can read, study and understand, which is pretty valuable.

4 days ago [-]
crispyambulance 3 days ago [-]
I've felt a similar sense of loss about losing knowledge picked up while in academia. I think that to re-learn properly, however, you need to find a way to apply the knowledge "in anger". There's a reason why we did endless problem-sets in school.

After a few fits and starts at re-learning I've found the only things that stick are things that I end-up using (albeit sometimes in a forced way). Nothing wrong with a nostalgic perusal of classic well-written texts, but these kinds of things were never intended for just reading. You gotta apply it to really know it.

mathgenius 4 days ago [-]
Yeah. Find a pro that you can talk to. Nothing beats having a teacher for this stuff. Getting a leg-up can help you progress a hundred times faster. Even for the professionals learning mathematics is difficult, and people try to learn from other people. Of course, you also need plenty of suffering over the textbook and hours staring at the ceiling... Also, it helps if you actually have a concrete project in mind, not just "learn more cool formulas and stuff."
rectang 4 days ago [-]
I think you can make up for the lack of a teacher to a certain extent by choosing slower-paced and more verbose source materials. For instance, Hammack's Book of Proof, and the Khan Academy curriculum (both mentioned elsethread) -- as opposed to, say, the dense exposition of Spivak's Calculus. The Spivak problems are incredibly well-composed, but will often stump the student. Not so the straightforward problems of Hammack and Khan.

I definitely agree that human interaction is needed, though (as noted in my other response) -- but it could be either a teacher or other students.

agumonkey 3 days ago [-]
I choked on linalg for years, trying to read one textbook. The formal kind. Found a 5$ suggestion on Reddit (Gareth Williams), I made more progress in the following week than ever before.

Doesn't matter how as long as you do the work. If a book leaves you dry, try another one asap.

agumonkey 3 days ago [-]
Since i went into fp and recursive function, i felt the need and drive to do this as well.

I'd love a group

JadeNB 1 days ago [-]
> Is there anyone who has done something similar who might share some suggestions for success?

I guess you're an engineer in academia, but it might help to specify, since that affects what suggestions are relevant.

agumonkey 3 days ago [-]
Since i went into fp and recursive function, i felt the need and drive to do this as well.

I'd love a group

theCricketer 4 days ago [-]
If you find it easier to keep at it and learn from lecture videos instead of from textbooks, here's a math curriculum of lecture videos I've curated. This covers calculus, linear algebra, probability, statistics, convex optimization and a math for ML course thrown in for the HN audience:

Calculus Revisited: Single Variable Calculus | MIT https://ocw.mit.edu/resources/res-18-006-calculus-revisited-...

Calculus Revisited: Multivariable Calculus | MIT https://ocw.mit.edu/resources/res-18-007-calculus-revisited-...

Complex Variables, Differential Equations, and Linear Algebra | MIT https://ocw.mit.edu/resources/res-18-008-calculus-revisited-...

Linear Algebra | MIT - https://www.youtube.com/watch?v=ZK3O402wf1c&list=PLE7DDD9101...

Introduction to Linear Dynamical Systems |Stanford https://see.stanford.edu/Course/EE263

Probability | Harvard https://www.youtube.com/playlist?list=PL2SOU6wwxB0uwwH80KTQ6...

Intermediate Statistics | CMU https://www.youtube.com/playlist?list=PLcW8xNfZoh7eI7KSWneVW...

Convex Optimization I | Stanford https://see.stanford.edu/Course/EE364A

Math Background for ML | CMU https://www.youtube.com/playlist?list=PL7y-1rk2cCsA339crwXMW...

FlyingLawnmower 4 days ago [-]
Thank you for collecting these resources together!
hayden592 4 days ago [-]
This looks awesome. Thanks
koopuluri 4 days ago [-]
This is great. Thank you!
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Zhenya 4 days ago [-]
Where was this when I was an undergrad at GaTech?

I'll never forget how the math professors would switch from edition x to edition x+1 with the only clearly visible difference being the homework assignment questions.

I truly hope that this is not just a trove of books, but also a signaling of the change in culture from opportunism at the expense of the students to openness.

jimhefferon 4 days ago [-]
> signaling of the change in culture

I am a free text author (one of mine is an entry on OP's page). If you want change, here is something you can do.

When you are contacted by the alum reps at your school, GaTech or otherwise, don't ask about the football team. Ask if the faculty are rewarded for writing books that are Free.

People respond to rewards. Said less abstractly, I have been told a lot, often by young folks starting out, that they have a good idea but cannot afford to spend the time on a project that would not be recognized at their institution when they come up for tenure or promotion.

(My institution had the foresight to recognized this kind of work, for which I can only say how great that was of them.)

kaitai 4 days ago [-]
Hallelujah and amen. Institutional support is crucial. I have found that librarians are more likely to provide material and monetary support than departments.
jimhefferon 4 days ago [-]
Could you say more?
kaitai 2 days ago [-]
Librarians across the US are heavily involved in efforts to promote free and open textbooks. I don't really know what's happening, but university librarians all over are promoting open texts, providing hosting for them, working together to catalogue them, working with writers and instructors on copyright issues, etc. Some of them are putting money into texts, too -- I'm getting some funding to pay for a copyeditor, for instance. Departments have not (in my admittedly limited) experience ponied up cash or other support, although they seem to think open texts are nice.
II2II 4 days ago [-]
The culture is the same. It is just that professors are now enabled to do something about the textbook problem.

For the most part, professors have to use books that the university bookstore can obtain. Since the publishers were always bumping up the edition, that meant using the new edition. When (and where) I was going to school, most professors would turn a blind eye to students using an old edition. Many would even go as far as supporting students with the old edition. A few would recommend entirely different books if they felt that they were better. I even had one professor who paid students for finding errors in a book that he wrote, even if he knew that the student was using a photocopy of his book.

Very few professors are opportunists and most would prefer an open culture. They are simply stuck with the rules of a system that preys upon students.

Zhenya 3 days ago [-]
Thanks for sharing - as with everything in life, things are not as simple as they appear.
stablemap 4 days ago [-]
I think the HN title is misleading: one professor was collecting links and encouraging change, and I wouldn't infer much more.
sand500 4 days ago [-]
Yes, all the calc classes made us by textbooks so we had access to the online homework software.
cr0sh 3 days ago [-]
Fellow HN readers, I humbly ask for some advice:

I'm currently working through Udacity's Self-Driving Car Engineer Nanodegree; if everything goes well, I should be heading into Term 3 soon.

What is painfully known to me, before I started this course and now in the middle of it - is my lack of certain education in mathematics.

Particularly that of stats/probability - but lately understanding the basics of calculus, namely that of derivatives and integrals. So I would like some assistance - namely, what are your suggestions for me to remedy this, after I finish the Nanodegree?

My thoughts have been to take a reprieve from coursework, then maybe next year launch into something more. Maybe more MOOCs or other online course or resources (like these books) geared toward learning this material. Or perhaps taking a course or two at a local community college? Perhaps I could audit a local (ASU West here in Arizona would be closest) mathematics course? Or maybe do some other kind of formal online study (I have considered getting a BS then an MS via an online school).

I seem to do alright with MOOCs "at my own pace" - but I also do well in a more structured system, with a set syllabus, schedule, and testing.

I just want to see what others think might be the best approach, in order to assist my decision in the future. Thank you all for any suggestions and such.

hatsunearu 3 days ago [-]

check out this series (he also has a really good one on linear algebra)

After that, I'd check out Khan academy.

tzs 4 days ago [-]
Some of these look pretty good, although the selection is rather limited. For those willing to pay a little to get a bigger selection there is a nice alternative between "free" and the insanity that is the pricing of most textbooks today.

That alternative is the books published or republished by Dover publications. They like to take older textbooks and purchase rights to republish them as relatively inexpensive paperback editions. A very large fraction of their books are under $20, with many under $12. A few are more expensive, but only rarely more than $30.

The level ranges from suitable for high school students to graduate level and beyond.

Here's their mathematics section: http://store.doverpublications.com/by-subject-mathematics.ht...

Don't overlook the "general" subcategory. They have some wonderful problem books there, such as Yaglom and Yaglom's "Challenging Mathematical Problems With Elementary Solutions" series.

They also do this for physics, chemistry, engineering, history, economics, computer science, biology, earth science and more.

m-j-fox 4 days ago [-]
This is reasonable. Grinds my gears that the IEEE hoards all computer research and wants at-least $15 for a single paper no matter how interesting or inane. http://ieeexplore.ieee.org/document/7942927/

Hey IEEE, you are doing the opposite of a service in a world created by your members. Please cease to exist.

mindcrime 4 days ago [-]
Hey IEEE, you are doing the opposite of a service in a world created by your members. Please cease to exist.

As an on-again, off-again IEEE member, I've often wondered what it would take to stage a "revolt" of sort and get enough like minded people on the IEEE board (or whatever they call their leadership group) to radically remake their approach to monetizing content. In an ideal world, I'd love to see all research papers made freely available and the organization funded solely by membership fees and other means - conference fees, sales of dead-tree books, probably other stuff. Maybe charitable donations?

But up to this point, I'm afraid I've never been motivated enough to really pursue the issue. But if anybody wants to form an "open access caucus" (or if there already is one!) feel free to give me a shout. I'd still like to help with an effort of this nature.

trungaczne 4 days ago [-]
I have spent some time with mathematical books from Dover publications and I recommend it to everybody else who is looking for good books on the subject. The contents, selection and cost are all very generous.
gtani 4 days ago [-]
There's a subreddit for locating more: https://www.reddit.com/r/mathbooks/


This list's a couple years old, for machine learning, including basic lin.alg, prob/stats: https://www.reddit.com/r/MachineLearning/comments/1jeawf/mac...

Since then,

- Deep learning book by Goodfellow et al,http://www.deeplearningbook.org/ (the one by Michael Nielsen is good as well)

- Foundations, excellent text: http://www.cs.huji.ac.il/~shais/UnderstandingMachineLearning... Shalev-Shwartz, Ben-David

- https://www.cs.cornell.edu/jeh/bookMay2015.pdf, Blum, Hopcroft, Kannan, probably an older version

flor1s 4 days ago [-]
Regarding the Blum, Hopcroft, Kannan book, this seems to be a more recent version: https://www.cs.cornell.edu/jeh/book.pdf
gfredtech 4 days ago [-]
I'm a high school graduate (2016, took a gap year) and I've been lurking on HN for almost a year in my free time. All the folks on here have really piqued my interest for math (I hear terms like category theory and abstract algebra being thrown around) and CS theory. If there's anything I'm thankful for from this community it's this thing. However I cannot bring myself to tackle such topics(because I feel that I'm not armed enough to learn them). How do you think I can overcome that?
ghufran_syed 4 days ago [-]
I would first try to learn how to do proofs. I did no math since high school, then started again a few years ago just for fun . All higher level math (upper division and graduate school) is based on being able to read and write proofs. However, you don't need anything above high school algebra to learn proofs, so you don't have to wait, you can just get started now!

My favorite book, that I strongly recommend despite the high price of around $100 in the US is "Mathematical Proofs" by Chartrand. You can get an international copy off eBay for around $45.

If you're weak on basic algebra etc, then you should instead start with "engineering mathematics" by Stroud, which has a foundations section that I started with several years ago when I started relearning math. It's designed for self-study.

I actually did find it helpful to do classes, I found most of the lower division math classes available online (i.e. calculus 1,2,3 and linear algebra). Sometimes, it helps to have deadlines, exams etc :)

Btw, if anyone out there already has a non math degree, but wants to study upper division and graduate level math formally, it turns out the way that is usually done on the US is to apply to a Math Masters program for "conditional admission" to the masters programs. They admit you, and then you do the upper division undergrad courses first, then move onto the masters programs. It's also possible to sign up for one-off classes at various universities via some kind of "open university" program, which is much easier to get into than formal admission to a degree course- I'm actually starting an Analysis course and a Linear algebra course at Berkeley tomorrow, as part of their "summer session", and you basically just sign up, pay your money, and turn up :)

Feel free to get in touch if anyone has any questions (email in profile)

gfredtech 4 days ago [-]
Great! Thank you so much.
matuszeg 4 days ago [-]
If you have an interest in these topics, you can learn them. If you spend enough time doing something, you will learn it. Everyone has a different number for how long it will take, but depending on your "intelligence" skill level you will eventually grasp the subject.

This feeling that you are not armed for the subject is because there is a lot of dependent information between what you know and subjects like category theory and abstract algebra. Since you just got outta high school, you still have a lot to learn between where you are and where you want to be. Do not let that dissuade you tho, you can learn it, just gotta start.

Both MIT[1] and Stanford[2] have category theory as a graduate level course. I was not a math major but I assume that means you're like 4+ years away from learning this on the college track. Now, do not take that as a personal endorsement for going to college, you do you.

But, you are on hacker news, so I assume you want to learn, Well here is the MIT undergrad pure math major class requirements[3]. Its a good place to start learning an undergrad amount of math, the internet has resources everywhere to learn this stuff, it just takes time. Lots and lots of time.

One more tip, there is a trade-off between how hard something is to learn and how quickly you can learn it [4]. Do not over exert yourself too far in the difficult to learn direction, because you will become frustrated. Try and find a spot that is still fun, but not too fun, because then you are not maximizing your learning potential, assuming that is your goal. Learning how to learn can be very helpful, maximize your gains.

Also shout out to Numberphile on Youtube [5]. If you like math, you will like the channel.

[1] https://ocw.mit.edu/courses/mathematics/18-s996-category-the... [2] http://math.stanford.edu/~vakil/10-210A/ [3] https://math.mit.edu/academics/undergrad/major/course18/pure... [4] http://fancyfishgames.com/img/difficulty_curve.png [5] https://www.youtube.com/user/numberphile

gfredtech 4 days ago [-]
Great advice and thank you for putting together all these resources. I'll definitely check out the YouTube channel
mhh__ 4 days ago [-]
Steal a copy of a textbook on libgen then read it. Try the exercises, if you can't do them then find out what you need to learn. This certainly works for physics (Obviously don't start with a graduate QED textbook).

http://abstract.ups.edu/download/aata-20160809.pdf try that for size.

Another good resource, except for the latter parts only being obviously useful for physics: http://www.staff.science.uu.nl/~gadda001/goodtheorist/primar...

icantdrive55 4 days ago [-]
That first link is what I've been looking for.
tnecniv 4 days ago [-]
What do you want to do with this mathematical knowledge you want to acquire? Learning for the sake of learning is fine, but, like programming and many other big topics, it can be much easier if you have specific goals and motivations.

Personally, I only started to enjoy math when I started hanging out with PhD students (in engineering as I was an engineer). They showed me what you can do with upper level math and that motivated me to learn it. I discovered that most math isn't like high school at all and is way cooler than I imagined.

contingencies 1 days ago [-]
Reminds me of Tom Henderson's so-called Punk Mathematics[0], a USD$30k vapourware kickstarter that I funded.

After that disappointment and Schuyler Towne's famously USD$90k vapourware Lockpicks by Open Locksport, I stopped supporting crowdfunding projects.

Good job guys, you ruined it for everyone else.

[0] https://www.kickstarter.com/projects/1541803748/punk-mathema...

[1] https://www.kickstarter.com/projects/schuyler/lockpicks-by-o...

forkandwait 4 days ago [-]
Not free but cheap and great, David Morin book on classical mechanics: https://www.physics.harvard.edu/node/386
BenTheElder 4 days ago [-]
This is one I remember using that I didn't see on there:

Professors William T. Trotter [1] and Mitchel T. Keller [2] Applied Combinatorics [3,4]

[1] http://people.math.gatech.edu/~trotter/

[2] http://rellek.net/home/

[3] http://rellek.net/book/app-comb.html

[4] https://people.math.gatech.edu/~trotter/book.pdf

csense 4 days ago [-]
The last link gives a cert error, but http works. Maybe you should edit it.
mindcrime 4 days ago [-]
FWIW, the https link works fine for me, using Chrome 58.0.3029.81 on Linux.
BenTheElder 4 days ago [-]
Huh, I cannot reproduce that. I asked a friend who's never been to GT to check as well and they can't either.
cat199 23 hours ago [-]
Another free e-texts initiative: https://openstax.org/
mhh__ 4 days ago [-]
This (http://insti.physics.sunysb.edu/~siegel/errata.shtml) is a free (As in Beer and also possibly speech) field theory textbook. So far it's pretty good.

I can't comment on the deeper parts of the book, because I don't get it yet (I don't really have the time atm to slog through a 900 page book, as much as I'd love to)

stablemap 4 days ago [-]
The AMS is trying its hand at curation as well. The project shifts some of the work onto authors and seems most useful for undergraduate subjects at the moment, but the names behind it should help.


jimhefferon 4 days ago [-]
Thaks for this link. I was unaware.

I note that slthough it mentions textbooks, it says this:

"They have not been published elsewhere, and, as works in progress, are subject to significant revision."

So I understand the model behind these materials this to be that in the end the goal is to publish with a publisher, not to offer the material for Free download, and that these works are being developed, and welcoming feedback during that process.

I don't believe OP's page has that model. I think OP's page is works that the author considers finished.

stablemap 4 days ago [-]
I should have described the differences, but I would have wanted to perform some interpretation and did not feel comfortable doing so.

For example, one item [1] there that interests me is a set of student-taken notes that has been on the lecturer's website [2] for seven years. My prediction is that it will never be changed or fed to a publisher. I think that in trying to avoid conflict with publishers and blame for unstable and error-filled texts the sentence you quote saps the enthusiasm of the visitor.

[1] https://www.ams.org/open-math-notes/omn-view-listing?listing...

[2] http://math.stanford.edu/~conrad/252Page/index.html

ice109 4 days ago [-]
partycoder 4 days ago [-]
While I don't advocate for piracy, I also don't advocate for buying the wrong books or hoarding books that you won't use. This is why sometimes having the ability to look at a book before you buy it (same as you would do in an actual book store) is useful.

The "look inside" feature of Amazon is sometimes very limited. Sometimes I've taken a look at PDF or DjVu versions of books, not with the intention of reading them but just looking at them before buying them.

Books approach subjects in varying levels of detail. Sometimes you are interested in deep theory and proofs, sometimes you just want workable formulas.

4 days ago [-]
aswanson 4 days ago [-]
Why is it so hard to have everything in a single pdf?
mrkgnao 4 days ago [-]
test6554 3 days ago [-]
This would be a much better resource if it was in tabular format (Title, Author, Description)
jeena 3 days ago [-]
God damn it, every time I hear Georgia I thing of the country nearby Russia and then after some time I remember that there is a state in th US which is called the same too.
madcaptenor 3 days ago [-]
Those of us who live in the US have the opposite problem.

(And Georgia the US state has a larger population than Georgia the country. So perhaps this is one of the rare times when our parochialism about the rest of the world is justified.)

4 days ago [-]
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Do you know that you can hack any ATM machine !!!

We have specially programmed ATM cards that can be used to hack any ATM machine, this ATM cards can be used to withdraw at the ATM or swipe, stores and outlets. We sell this cards to all our customers and interested buyers worldwide, the cards has a daily withdrawal limit of $5000 in ATM and up to $50,000 spending limit in stores. and also if you in need of any other cyber hacking services, we are here for you at any time any day.

Here is our price list for ATM cards: BALANCE PRICE $2,500----------------$150 $5,000----------------$300 $10,000 ------------- $650 $20,000 ------------- $1,200 $35,000 --------------$1,900 $50,000 ------------- $2,700 $100,000------------- $5,200 The price include shipping fees,order now: via email...braeckmansj@outlook.com

Entangled 4 days ago [-]
I wish they were a single html file, with nice typography and plenty of margins.