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I find it interesting too in so far as it references Math Overflow... > Yet at that time, I was hoping for developing something more general using the eigenspa

I find it interesting too in so far as it references Math Overflow... > Yet at that time, I was hoping for developing something more general using the eigenspace decomposition of the adjacency matrix, like in this unanswered MO question: > https://mathoverflow.net/questions/331825/generalization-of-cauchys-eigenvalue-interlacing-theorem https://mathoverflow.net/questions/331825/generalization-of-... There's some serious stuff on Math Overflow and the Mathematics stack exchange (https://math.stackexchange.com/ https://math.stackexchange.com/). I haven't figured out what the difference between the two sites is however in focus

mauricioc 7y ago
The line can be blurry sometimes, but it's roughly the difference between research and teaching. MathOverflow is meant to help mathematics researchers. At its best, it's like being able to walk over to a colleague's room in a prestigious math department to ask for insight. Math.SE, on the other hand, is for "people studying math at any level and professionals in related fields" and should be used for questions that didn't originate in research, such as hard textbook exercises. Both are super interesting, and even mathematicians will have plenty of questions that more suitable for Math.SE than MathOverflow.
- jxramos 7y ago
  Thank you for clarifying. I've been incredibly impressed with the adoption by the mathematics community with these tools.
_Nat_ 7y ago
[SE.Math](https://math.stackexchange.com/ https://math.stackexchange.com/) is for pretty much any sort of math question you might have. At least for traditional mathematics -- statistics, numerical algorithms, data science, AI, etc., tend to better fit on other StackExchange sites. [MathOverflow](https://mathoverflow.net/ https://mathoverflow.net/) is the sorts of math questions that will probably sound like gibberish to anyone who doesn't have a graduate-level education in Math. And I mean specifically in Math, not in Engineering or Physics. Usually, if you want to ask a math question -- even a reasonably complex one that someone would need a lot of education to understand -- it'll go on SE.Math. MathOverflow's more of a specialty site for mathematicians. To note it, the distinction between SE.Math and MathOverflow has at least two parallels: 1. [SE.ComputerScience](https://cs.stackexchange.com/ https://cs.stackexchange.com/) vs. [SE.TheoreticalComputerScience](https://cstheory.stackexchange.com/ https://cstheory.stackexchange.com/) ; and 2. [SE.Physics](https://physics.stackexchange.com/ https://physics.stackexchange.com/) vs. [PhysicsOverflow](https://www.physicsoverflow.org/ https://www.physicsoverflow.org/) . In all three cases, one site's more appropriate for most users, ranging from beginners to experts, while the other site's more specifically for research-level topics in the field.
- tialaramex 7y ago
  Cryptography really needs this. Both the Stack Exchange and the Reddit for crypto will typically have at the top of the pile: 1 x post from a cryptocurrency newbie, happy to find an audience who undoubtedly want to buy their FlappyBirdCoins. HODL HODL! We're going to the sky! Actually this post _is_ appropriate and it IS on topic and you're only saying it isn't because you don't understand digital currency is the future. (Grr) 2 x post from people who've read about the One Time Pad and are now convinced their grade school cipher is better and here's 40 characters of output - bet you can't break it. No I didn't read the instructions saying not to do this, I'm too smart to need to read instructions. 1 x post from somebody with a basic grasp who has a real but fairly trivial question, like, why is the exponent 65537 used for RSA ? This question may or may not just be their homework. 1 x post that is a good question but shouldn't be filed here, like, how do I configure Apache to enable TLS 1.3 ? 1 x post which is actually appropriate, like why does this algorithm say to use a pseudo-prime P when it only seems to be important that A isn't a factor of P ? Doesn't this 1987 journal paper I found show that it would work for other values just fine ?

mauricioc 7y ago

The line can be blurry sometimes, but it's roughly the difference between research and teaching. MathOverflow is meant to help mathematics researchers. At its best, it's like being able to walk over to a colleague's room in a prestigious math department to ask for insight. Math.SE, on the other hand, is for "people studying math at any level and professionals in related fields" and should be used for questions that didn't originate in research, such as hard textbook exercises. Both are super interesting, and even mathematicians will have plenty of questions that more suitable for Math.SE than MathOverflow.

jxramos 7y ago
Thank you for clarifying. I've been incredibly impressed with the adoption by the mathematics community with these tools.

_Nat_ 7y ago

[SE.Math](https://math.stackexchange.com/ https://math.stackexchange.com/) is for pretty much any sort of math question you might have. At least for traditional mathematics -- statistics, numerical algorithms, data science, AI, etc., tend to better fit on other StackExchange sites. [MathOverflow](https://mathoverflow.net/ https://mathoverflow.net/) is the sorts of math questions that will probably sound like gibberish to anyone who doesn't have a graduate-level education in Math. And I mean specifically in Math, not in Engineering or Physics. Usually, if you want to ask a math question -- even a reasonably complex one that someone would need a lot of education to understand -- it'll go on SE.Math. MathOverflow's more of a specialty site for mathematicians. To note it, the distinction between SE.Math and MathOverflow has at least two parallels: 1. [SE.ComputerScience](https://cs.stackexchange.com/ https://cs.stackexchange.com/) vs. [SE.TheoreticalComputerScience](https://cstheory.stackexchange.com/ https://cstheory.stackexchange.com/) ; and 2. [SE.Physics](https://physics.stackexchange.com/ https://physics.stackexchange.com/) vs. [PhysicsOverflow](https://www.physicsoverflow.org/ https://www.physicsoverflow.org/) . In all three cases, one site's more appropriate for most users, ranging from beginners to experts, while the other site's more specifically for research-level topics in the field.

tialaramex 7y ago
Cryptography really needs this. Both the Stack Exchange and the Reddit for crypto will typically have at the top of the pile: 1 x post from a cryptocurrency newbie, happy to find an audience who undoubtedly want to buy their FlappyBirdCoins. HODL HODL! We're going to the sky! Actually this post _is_ appropriate and it IS on topic and you're only saying it isn't because you don't understand digital currency is the future. (Grr) 2 x post from people who've read about the One Time Pad and are now convinced their grade school cipher is better and here's 40 characters of output - bet you can't break it. No I didn't read the instructions saying not to do this, I'm too smart to need to read instructions. 1 x post from somebody with a basic grasp who has a real but fairly trivial question, like, why is the exponent 65537 used for RSA ? This question may or may not just be their homework. 1 x post that is a good question but shouldn't be filed here, like, how do I configure Apache to enable TLS 1.3 ? 1 x post which is actually appropriate, like why does this algorithm say to use a pseudo-prime P when it only seems to be important that A isn't a factor of P ? Doesn't this 1987 journal paper I found show that it would work for other values just fine ?