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Questions tagged [online-resources]

For questions seeking recommendations for online mathematics resources that are useful at a research level.

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29 votes
6 answers
3k views

Errata database?

Some authors do a really great job by collecting errors and comments to their books and putting a list on their websites. I wonder if there is some (perhaps wiki-style) website where errata are ...
user717's user avatar
  • 5,233
177 votes
80 answers
66k views

Best online mathematics videos?

I know of two good mathematics videos available online, namely: Sphere inside out (part I and part II) Moebius transformation revealed Do you know of any other good math videos? Share.
147 votes
15 answers
22k views

Is a free alternative to MathSciNet possible?

How could a free (i.e. free content) alternative for MathSciNet and Zentralblatt be created? Comments Some mathematicians have stopped writing reviews for MathSciNet because they feel their output ...
110 votes
15 answers
11k views

Are there any good websites for hosting discussions of mathematical papers?

I was wondering if there are any websites out there which systematically provide space for the discussion of mathematics articles (particularly those on the arXiv, though not necessarily just those),...
424 votes
93 answers
149k views

Video lectures of mathematics courses available online for free

It can be difficult to learn mathematics on your own from textbooks, and I often wish universities videotaped their mathematics courses and distributed them for free online. Fortunately, some ...
83 votes
28 answers
8k views

What could be some potentially useful mathematical databases?

This is a soft question but it's not meant as a big-list question. I have recently been asked whether I want to provide feedback at the pre-beta stage on a forthcoming website that will provide a ...
44 votes
11 answers
16k views

Resources for learning practical category theory

I've been doing functional programming, primarily in OCaml, for a couple years now, and have recently ventured into the land of monads. I'm able to work them now, and understand how to use them, but ...
23 votes
3 answers
1k views

Which tools can identify scholarly papers that use the same types of equations?

Many types of equations are being used in multiple contexts, so a search for specific formulas might be one way to identify scholarly papers that are conceptually related. Is any website or tool ...
Daniel Mietchen's user avatar
32 votes
2 answers
2k views

Wayback Machine for mathematics?

I have had a couple of experiences recently which have made me wonder whether the mathematics community should try to establish and maintain something like the Wayback Machine, but specifically ...
Timothy Chow's user avatar
  • 82.6k
29 votes
6 answers
6k views

Where to find Astérisque online?

Is there a place online where one can download papers that have appeared in the Astérisque if "your institution subscribes"? I am especially interested in back issues: Astérisque series published a ...
Anonymous's user avatar
  • 299
28 votes
6 answers
1k views

Online events during the quarantine

With many places on earth subjected to quarantine and large gathering prohibited, there are announcements of online seminars and talks open to people around the world. The talks can be conducted via ...
17 votes
9 answers
3k views

Where on the internet I can find a database of graphs?

I am studying graph algorithms. I need a database of graphs on which I can test my algorithms. Where can I find a reliable database of graphs of all kinds? Thanks!
96 votes
5 answers
8k views

Is there a database for tracking the dependencies of mathematical theorems?

Given a proof for a result, one could denote the proof as a node on a graph, and then draw arrows to the node from axioms and previous results that the proof uses, and then draw arrows from the node ...
Chill2Macht's user avatar
  • 2,680
77 votes
30 answers
6k views

Atlas-like websites on specific areas of mathematics

In this post, we look for the existing atlas-like websites providing well-presented classifications or database about some specific areas of mathematics. Here are some examples: GroupNames: https://...
49 votes
20 answers
20k views

Sources for BibTeX entries

Does anyone know of a good place to find already-done BibTeX entries for standard books in advanced math? Or is this impossible because the citation should include items specific to your copy? (I am ...
33 votes
3 answers
2k views

Wiki for consequences of axiom of choice?

I raised the following question as part of another MO question, but I am following the suggestion of Nate Eldredge to make it a question in its own right. For many years, there has a been a valuable ...
Timothy Chow's user avatar
  • 82.6k
31 votes
11 answers
2k views

Combinatorial databases

At one point, I remember being excited by seeing the website Encyclopedia of Combinatorial Structures as an extension of Sloane's Online Integer Sequence Database site. Unfortunately, the site (ECS) ...
29 votes
6 answers
1k views

Link Repository of International Dissertations

This question (cry for help?) grew out of Colin Tan's question: does anyone have a copy of schmid’s effective work on hilbert 17th? which was a request for a copy of an Habilitationsschrift. We've ...
22 votes
7 answers
2k views

Examples of (Git) open math (texts) projects

I am an active part of a research project on the positive effects of open math projects on the community. With open math projects I have in mind a particular thing, namely a GIT project on mathematics ...
20 votes
1 answer
2k views

LMS Lectures on Geometric Langlands

Everybody knows how insightful are David Ben-Zvi talks (and comments/answers here on mathoverflow). I was trying to watch the LMS 2007 Lecture Series on Geometric Langlands by David, supposedly made ...
Carlos's user avatar
  • 653
18 votes
4 answers
4k views

Are there any recordings of Grothendieck online?

Illusie mentions tape recordings of Grothendieck explaining his trace formula and more. Are they or similar recordings online? I guess, even if (what I doubt) everything he thought about that is ...
Thomas Riepe's user avatar
  • 10.8k
16 votes
5 answers
1k views

Permission to use Online Notes

I am a new professor in Mathematics and I am running an independent study on Diophantine equations with a student of mine. Online I have found a wealth of very helpful expository notes written by ...
16 votes
4 answers
3k views

Is there a connection between representation theory and PDEs?

As a PhD student, if I want to do something algebraic / linear-algebraic such as representation theory as well as do PDEs, in both the theoretical and numerical aspects of PDEs, would this combination ...
Jay's user avatar
  • 179
16 votes
5 answers
4k views

Resources where I can find open problems in number theory along with their level of difficulty

NOTE: I will not accept an answer because a lot of answers are really good and if anyone want to post under this question later then they are most welcome to post as comment or answer because it will ...
13 votes
5 answers
3k views

Online introduction to Lattice Theory?

Apart from J. B Nation's Notes on Lattice Theory, is there any other (mostly introductory) material on Lattices available online? NB: The last update of Nation's notes was 2017, as of Feb 2023.
adamo's user avatar
  • 343
12 votes
3 answers
2k views

Database of finite presentations of used groups

Do You know any kind of database of presentations of groups? It may be on-line or off-line in form of tables, ideally case would be integrated in some Computer Algebra System. I am interested the ...
3 votes
0 answers
341 views

Resource request: Moyal $\star$-product based calculations

I already asked two questions about the Moyal $\star$-product here and here but I think I'll have a lot more similar questions, so I'm wondering if anyone can help me with finding some good resources. ...
lel's user avatar
  • 314
1 vote
1 answer
358 views

Best way to find recent papers in a special field of mathematics?

My subjects of interest are Geometry of Banach spaces, renorming theory and fixed point theory. When I want to find recent papers in these fields of mathematics, mostly, I search name of paper, say, ...
user62498's user avatar
  • 823