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Questions tagged [reference-request]

This tag is for questions seeking external references (books, articles, etc.) about a particular subject. Please do not use this as the only tag for a question.

This tag is for questions seeking external references (books, articles, websites, etc.) about a particular subject. It is intended for use along with other, more "mathematical" tags. Please do not use this as the only tag for your questions. See this discussion on Meta.

20936 questions
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References for $\delta(x-a)=\frac{1}{2\pi}\sum_{k=-\infty}^{+\infty}e^{i k(x-a)}$

In a website, Integral and Series Representations of the Dirac Delta, I found this series expansion of the Dirac delta function $$\delta(x-a)=\frac{1}{2\pi}\sum_{k=-\infty}^{+\infty}e^{i k(x-a)}$$ For this formula the website refers to unspecified…
Mark
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Alexander Multivariate Polynomial of a General Torus Link

In his book Singular Points of Complex Hypersurfaces, Milnor quotes the Alexander (multivariate) polynomial of the torus link $T_{p,pq}$ \begin{align} \Delta_{T_{p,pq}}(t_1, \dots, t_p) = \frac{((t_1 \cdots t_p)^{q} - 1)^{p-1}}{t_1 \cdots t_p - 1}…
user02138
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Is there an opposite to the Squeeze theorem?

I'm familiar with the squeeze theorem (AKA Two Policemen and a Drunk---no matter how wobbly, the drunk will reach the same destination as the policemen). Is there is an opposite theorem that tugs or pulls (AKA One Policeman hand-cuffed to a…
Fred Daniel Kline
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Searching for formulas?

Is there a site to search for formulas? I often come up with formulas that I would like to know the name, where they are used or what they are related to. One would type, for example, $\sin(a)\cos(b)+\sin(b)\cos(a)$ and it would intelligently…
Dokkat
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Which books of Euler are accessible to high school students?

I am currently a first year undergraduate but I still feel as if I cannot read many undergraduate level books. At the moment I am interested in reading some classics. I have already read Euler's Elements of Algebra which I thoroughly enjoyed and…
user92570
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What are some recommended books, online sources, and applications (PC or Android platform) for becoming good at math?

What are some recommended books, online sources, and applications (PC or Android platform) for becoming good at math? I am specifically looking for books, online resources, and apps that will refresh my knowledge from the beginning of basic math to…
avoicefromtheages
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Recommendation for books on math similar to Robert Kanigel's "Man who knew infinity"

Recently my friend gifted me Robert's Kanigel book "Man who knew infinity" and i loved it.I have read genius of RAMANUJAN .I have got interested in books on mathematics . If anyone know special books on life of math geniuses . Please let me know i…
godonichia
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Recommendations for books with solutions, to review wholly high school math?

I am looking for books for the full high school maths curriculum, just to refresh myself (it's been years). it must have questions & solutions.
cstruter
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The math and logic of video games

Is there a paper or text somewhere where someone axiomatizes the concept of video or computer games and makes definitions and proves theorems? I would love to see such a text. It would be quite something.
user107952
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Books on prime gaps?

I want to have a book on prime gaps, which includes both the theory of prime gaps and all the results obtained. The conditions may be harsh, but I hope I can have some recommendations that fit at least one of the two conditions.
Yes
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KAM theory in dynamical systems

What is the best text/lecture notes to read if you want to learn KAM theory in Hamiltonian dynamical systems?
Trajan
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Good book for learning Calculus of Variations?

Possible Duplicate: Introductory text for calculus of variations What is a good book for learning Calculus of Variations on your own?
Mykie
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matrices whose entries $a_{ij}$ are groups

Has there been any work done on square matrices whose entries $a_{ij}$ are groups? (and with the operations below?) For instance: let $\mathbb{F},\mathbb{G},\mathbb{H},\mathbb{K}$, $\mathbb{A},\mathbb{B},\mathbb{J},\mathbb{W}$ be groups, and let…
graveolensa
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Can anyone please provide me a proof,directly or a link for Ptolemy's Second Theorem? Maybe it is also known as Mahavira's Result.

I referred to website www.cut-the-knot.org/proofs/ptolemy.shtml and www.mathafou.free.fr/themes_en/kptol.html but the material was not satisfactory and a little complicatedly represented. Thank you!
Hawk
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Analytical geometry text

Could someone give me a reference to a rigorous introduction (So I understand what's going on, that doesn't just give out formulas without explanation,etc.)to analytical geometry text ?? Keep in mind that I only have knowledge of high school…
user108343
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