## Knot database including text names

Knots such as the 3_1 knot and the 4_1 knot are often referred to as the trefoil and figure-eight knots respectively. There are more obscure names for some of the later ones in the knot tables, for example the 6_1 knot is also know as the stevedore knot. These names are not listed on the … Read more

## Databases for sequences indexed by partitions

Is there a database for sequences indexed by partitions similar to Sloane’s OEIS? I mean, I am aware that in the OEIS there are some arrays indexed by partitions, but I feel as though most of such sequences that frequently appear in combinatorial literature are not there. One example of a sequence I’d really like … Read more

## Resource request on “$\in$-homomorphisms” in Set Theory

Very loosely put, this is the intuitive idea behind an $\in$-homomorphism: Let $\mathcal{U}$ and $\mathcal{W}$ be universes of sets. A function $f \colon \mathcal{U} \to \mathcal{W}$ is said to be an $\in$-homomorphism if $f(X) = \{f(T) \in \mathcal{W} | T \in X \}$ for all $X \in \mathcal{U}$ Thomas Jech briefly mentions this concept … Read more

## A centralised website for computational attempts in graph theory and metric geometry?

The set of questions below stems from this question. 1) does a website exist that contains (at least links to) code and data files, with the aim to centralise computational results in graph theory (or more generally metric geometry), both definite ones and unsuccessful/partial ones? (Note that the Open Problem Garden website only lists statements … Read more

## Online study groups for individual mathematical texts

This has been one of my earlier academic dreams. I have pitched the idea to Prof Ravi Vakil, among others. Recently, because of participation in the mathematical competition hosted by Alibaba, I have decided to revive my decade-old enthusiasm. The basic idea is as follows. Many mathematical texts are difficult to penetrate on one’s own, … Read more

## Polymath type websites for specialized areas

This question is inspired by the success and more importantly, the democratizing affect of the polymath projects and Mathoverflow. I put the idea in my NSF proposals a few times, but the panels don’t seem to like it these days. So this year, instead of asking the government for help, I will appeal to my … Read more

## Mirror site for the NIST Digital Library of Mathematical Functions (DLMF)

For research I use the NIST Digital Library of Mathematical Functions (https://dlmf.nist.gov/) quite often for looking up basic facts about special functions. At the moment, however, this gives Sorry, but due to fact that the federal government is currently shut down, the website dlmf.nist.gov will be unavailable until further notice. Does anyone know if the … Read more

## What has happened with the Publications of the $n$Lab?

What has happened with the Publications of the $n$Lab? They seem to have published only a couple of articles back in 2011, 2012. A little search i made was not very enlightening. Has the project been discontinued? If yes why? (In principle, the idea seemed to be pursuing an alternative, electronic, publishing system with a … Read more

## Can the Math 2.0 Forum’s Closure be prevented? [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for MathOverflow. Closed 4 years ago. Improve this question Apologies if this is not regarded as suitable for MO, but I have noticed other “soft” questions and feel this deserves some attention by … Read more

## Where to find digitized old papers on the internet?

Following Murphy’s law for the published material: “The paper you need is too old to be in the arXiv, it is not in any online database which your institution has subscription to, and… it not even in the library!!!” I really need Z. Ran. On Subvarieties of Abelian Varieties. $Invent. Math.$ 62 (1981) p. 459–479. … Read more