# Tag Info

17

Maybe for the street person there is no difference but from the point of view of the mathematics involved there is a wide gap between these two tags. My answer is similar to hejseb's answer but I wanted to add more detail: Finance tag is likely to attract questions related to applications of stochastic calculus and stochastic partial differential equations. ...

17

I'm very encouraging of computational mathematics questions. After all, it's a large part of my job. I think it's agreed upon that mathematically themed questions relating to computer software are on-topic. The grey area comes when we talk about technical questions with no immediate mathematical content. Personally, I don't see the problem with asking ...

16

I suggest that we adopt the convention that $F_0=0$ for both the tag wiki and summary, with a possible note in the wiki that $F_0=1$ is occasionally used as well. Why? This is consistent with OEIS A000045 and it results in a nice form of Binet's formula (as opposed to a offset in the exponents). Other properties (as mentioned in the comments) rely on a ...

14

WillieWong wishes me to pass on this message: (he can't post it himself right now) Concerning the two tags physics and math-physics, I merged them a long time ago, but undid the merge at the request of the user t.b.. The justification is that there are two types of mathematical problems concerning physics, one is questions strictly about mathematics which ...

14

I consider the tag even-and-odd-extensions too specific to be really useful. (Having too specific tags applicable only to very narrow class of questions can cause problem since there are only five spots available for tags.) My suggestion is to create a new tag even-and-odd-functions. This tag is at least slightly more general. It might be potentially useful,...

13

This is just an initial point, not a complete and formed opinion. Somewhat of a long comment. There is a distinct difference between the question appear in your first comment, discussing how to perform certain mathematical operations in Maple, and questions such as a recently closed one which asked "How to use “-m memory ” with GAP?". The key difference, ...

12

Imagine this wasn't Math.SE, but Writing.SE. Questions on how to properly format, say, a rejection letter to a job applicant would be on topic. (Should it be justified? Should the font look formal? Should we write in the passive voice?) Questions on how to use Microsoft Word, however, would be off-topic. Convert this notion to Mathematics. A question ...

11

I agree with Andres, along with the many examples posted in the comments. The axiom of choice might be dealt with naively in some contexts, and those questions elicit the elementary tag. For example "How to use the axiom of choice to prove that every function has an injective inverse?" But on the other hand, there are questions on the site related to the ...

11

In practice they're totally different things. Finance's concerns are generally narrow, short-term, and quantitative, while economics is generally concerned with broad, long-term, and qualitative problems. Of course that's a massive oversimplification, but I don't think anyone would confuse the two areas.

11

I'd suggest closing as duplicate with a generic Q/A, which makes clear that any continuation is possible shows how to find continuations for simple cases (e.g., method of repeated diffferences for polynomial sequences) informs how look for sequences on OEIS.org

10

I don't expect that we shall ever know why the word "compact" appeared in the excerpt. It's almost exactly five years since the creation of the tag wiki excerpt (the tag wiki itself was however only created last year), and even if it was deliberate, I doubt the creator would still know the reason. Anyway, I went ahead and edited the excerpt.

9

At least the questions linked in the OP seem to be about relating values of the function (or its derivatives) at different points of the domain in each instance of the equation. I think this ought to be enough to make the functional-equations tag apply to the questions, even if the equation also involves derivatives. A priori, solving them they might need a ...

9

Current SE philosophy about suggested edits suggests that they need not be rejected out of hand. While once upon a time there was a "too minor" reject reason in the suggested edits review queue, this is no longer the case: The closest reject reason would be "no improvement whatsoever", but this should only be used when there is no improvement whatsoever ...

8

The terminology "geometric topology" as far as I'm aware is a fairly recent historical phenomenon. The words used by topologists to describe their areas has had a fair bit of flux over the years. Before the mid-40's, algebraic topology was called combinatorial topology. I think the urge to use the phrase geometric topology began sometime after the ...

8

I think both of them are needed. Browse through the questions and you'll probably see that they are a little different. For example, in the finance tag you have (or should have!) lots of questions about the pricing of financial assets (annuities, compound interest calculations, different asset pricing formulas such as Black-Scholes etc). In the economics ...

8

The vast majority of these questions is indeed off-topic. Their closing should continue. However, doing this with appropriate explanation (e.g. pointing to Puzzling.SE) can become tedious. On the other hand, a migration path is not going to happen as long as Puzzling is in beta, given earlier discussion about this (as linked to by Martin Sleziak). Moreover, ...

7

Every tag has an info page that you can get to by clicking on the tag name. Such as this one: calculus. You will be taken to a page that looks like this (If the tag doesn't have information the page displayed will be slightly different.) Simply clicking on "improve tag info" will bring up the editor and allow you to suggest an edit to the tag excerpt (a ...

7

A user gets privilege to edit tag-info (without having to go through review) only at 20k reputation points. It seems logical that only users with edit privileges get possibility to "improve edit" or "reject and edit". Here is a screenshot to show that at higher reputation these options are indeed offered: See also related posts on Meta Stack Exchange: ...

6

People should not be searching for/favoriting/subscribing to "functional-equations" to look for Differential Equations. I agree with the Phira's position in the question.

6

FWIW, rather than repurposing (complex-variables), I would prefer creating (several-complex-variables) (I think that fits the length limit). There would probably be a bit fewer questions on that topic than on just complex analysis, so giving it a longer and more descriptive name may (I hope) help prevent mistags.

6

Estimation Theory is a branch of statistics. Approximation Theory is a branch of real analysis. I guess (estimation) and (approximation) are used in less precise senses. Perhaps for estimates and approximations other than those specific ones in the first two.

6

A proposed tag wiki excerpt based on user1729's comments above: Questions about the details of implementing an $\epsilon$-$\delta$ proof, which typically appears in the context of analysis; for example about how the appropriate $\delta$ can be chosen for a given $\epsilon$. A proposed tag wiki: In mathematical analysis one often encounter statements ...

6

Martin Sleziak created a tag wiki and excerpt, based on the comment by Git Gud, who originally introduced the tag (as proposed in this post). Currently the description reads: For questions about proofs within a formal system, such as natural deduction or Hilbert system. Judging from the comments, the current interpretation appears to be: Yes, the tag is ...

5

Newer versions of MathJax have made this fast and easy enough to do just in time before animating the popup. It will be enabled in the next deploy.

5

I think the "problem solving" tag should be for questions about problem solving in general. For example, "what are the best strategies for solving inequalities?". It should not be used for concrete questions that simply use problem solving techniques, if those concrete questions are not about problem solving techniques. So I would say "problem solving" tag ...

5

I introduced the tag at the request of the OP of An example of functions on a groupoid (see the revision history, at the very end of the post). The introduction of the tag seemed like a good idea to me (also given that Ronnie Brown has become active here, recently). In that question the context makes it certain that groupoids in the categorical sense are ...

5

Estimation theory is the study of inverse problems arising from signal processing and is different from approximation theory. Broadly, given some random noise $\eta$ and observed signal $y$, one wishes to "solve" the equation $$y=A(x)+\eta$$ for $x$ ("estimate" $x$). The main complication is that for many problems of practical interest, $A$ may not be 1-1, ...

4

I would say that Finance focuses on the study of assets traded on financial markets, whereas Economics is concerned with ALL markets (financial markets, labor market, markets for goods...)

4

I don't see the point of the weekend, why not just have people start doing it as much as they can. Random free time seems like a much better plan for users to do this, and for mods to look over/approve. But this is just my opinion.

Only top voted, non community-wiki answers of a minimum length are eligible