# Questions tagged [reference-works]

Reference works include encyclopedias, dictionaries, books of tables (which may include numerical tables, tables of integrals, series, and products, tables of Fourier transforms, tables of finite groups, tables of combinatorial designs, etc.).

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### Explicit equations describing complex spin groups as affine algebraic groups

Although there are tons of questions about spin groups here on math.SE, I could not find there what I want. What I want is this. Take the complex spin group $\operatorname{Spin}(2n,\mathbb C)$. It has ...
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### Anyone recommend a fairly modern/new textbook on functional analysis/PDE's to be used as a reference for a graduate level course? [closed]

See question in title porfavor, just adding words to fill required number of characters
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### Need help finding G. Pick's 1917 article "Über affine Geometrie iv: Differentialinvarianten der Flächen gegenüber affinen Transformationen"

I'm studying affine geometry and I need help finding this article "Über affine Geometrie iv: Differentialinvarianten der Flächen gegenüber affinen Transformationen" written by G. Pick in ...
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### Is there a comprehensive list of complexity theoretic reductions from and to prime number factorization?

I am interested in the complexity theoretic equivalences of prime number factorization. I am especially interested to learn wether there are some not initially obvious reductions. Im sure there is a ...
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### Can someone provide a brief list of when, and when not to, use each finite difference approximation for derivative?

So far, I've received one possible scenario, and may be the only one, for using the forward difference in approximating the derivative rather than its central difference counterpart. And that is when ...
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### English translation of Opera Omnia, Euler

I want to read Euler’s works, and yes, I am aware that I can read them online, on Euler Archive. But, I was looking for physical books in which Euler’s works are compiled. When searching for the ...
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### What computer methods are used to quickly calculate the $\zeta$-function (if any)?

So I can think of how I could compute $\zeta(\sigma + it)$ in principle. We can take $\zeta(\sigma + it)$ for $\sigma>1$ by the usual $\sum_{n} n^{-(\sigma + it)}$ summation. We can use the ...
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### Books about synthetic projective geometry

Are there books in English about synthetic projective geometry? More specifically, results of Karl von Staudt (imaginary elements theory through elliptical involutions, imaginary circle, infinity's ...
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### Question about notation on the NIST DLMF

Many relations on the NIST DLMF have certain restriction on parameters that must be satisfied in order for the relation to hold. Take for example equation $15.8.5$ which lists multiple constraints on ...
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### How to get a math textbook that's out of publication?

I recently decided I wanted to learn more about the Dehn invariant, so I did what I always do and went on MSE and MO to get recommendations. I found this link, which suggested a book called "Theory ...
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### Errata in Convex Analysis and Minimization Algorithms by Hiriart-Urruty and Lemaréchal.

Hiriart-Urruty and Lemaréchal have written Convex Analysis and Minimization Algorithms I and II. Is there an errata list for these books?
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### reference request: visualizing ideal structures in CRing

In a basic algebra course last year, I learned some of how rings are taxonomized by properties such as "all the elements have unique factorization", or "all the ideals are principal ideals". Studying ...
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### Forward-backward induction

I've seen the famous proof presented by Cauchy for the AM-GM inequality but what other neat proofs use forward-backward induction? Is it fundamentally inextricable from ordinary induction (are there ...
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### When authors takes maths with a pinch of a salt [closed]

This thread aims to collect mathematical books where authors deal with serious topics and offbeat humour.
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### Sinusoidal decomposition of signal

I have some data of periodic nature. The curve seems to be slightly irregular, and it makes sense to consider it as the sum of two or more different sinusoidals. I'm asking for a source or tools ...
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