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 Yearling
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23h
comment What are super-translations?
Sabine Hoffsteder has some references to the literature on her blogpost about Hawking's recent work, which probably will lead you to the right direction. (Try searching for "BMS Supertranslations"; also see chapter 11 of Wald's General Relativity.)
Aug
7
comment How do you calculate $\lim_{z\to0} \frac{\bar{z}^2}{z}$?
More explicitly $|\bar{z}^{2}/z|=|\bar{z}|^{2}/|z|=|z|^{2}/|z|=|z|$.
Jul
25
answered Power serie of $f'/f$
Jun
14
comment which branch of computer science is most math intensive?
Automated theorem proving will involve a lot of logic and foundations of math, but I don't know if it's what you're after...
May
18
awarded  Yearling
Jan
25
comment For what values is my integral diverging or converging?
You ought to simplify $\alpha_{1}/2$ as 1 everywhere...it cleans things up a bit...
Jan
25
comment Simplify the sum $ \sum_{k=1}^{\infty} (\frac{1}{2})^kk $
What's $\sum_{n=0}x^{n}$ converge to? What's its derivative?
Dec
8
awarded  Caucus
Dec
8
comment Is it possible to create division via Set Theory?
You can formally construct the integers with an equivalence relationship atop the natural numbers, then construct the rationals using the integers you've just constructed.
Sep
30
awarded  Explainer
Sep
29
comment Geometric Interpretation of QFT Scattering Integrals
@Dave, the "generalization to $n$ dimensions" section discusses $\int_{\mathbf{R}^n} \delta(g(\mathbf{x}))\, f(g(\mathbf{x}))\, |\det g'(\mathbf{x})|\, d\mathbf{x} = \int_{g(\mathbf{R}^n)} \delta(\mathbf{u}) f(\mathbf{u})\,d\mathbf{u}$ and $\int_{\mathbf{R}^n} f(\mathbf{x}) \, \delta(g(\mathbf{x})) \, d\mathbf{x} = \int_{g^{-1}(0)}\frac{f(\mathbf{x})}{|\mathbf{\nabla}g|}\,d\sigma(\mathbf{x}) $
Sep
26
comment Riemann Zeta of 1/2 $\zeta(\frac{1}{2})$
For your first equation, why is it true for $x>1$, but you conclude a result for $x>0$? [I can't immediately see it, so even if you say something like "Equation x justifies it" would be appreciated :)]
Sep
24
awarded  Autobiographer
Aug
14
comment Is Category Theory geometric?
This book review claims "in this book his principal objective is to establish the claim that category theory is a generalization of Felix Klein's Erlangen program." So, what the author means by "geometrical" should probably be understood in that light...
Jul
27
comment How to I write $\frac{7^{2n}}{4^{3n}}$ as a geometric series?
Wait, you are trying to consider $\sum(7/4)^{2n}$? That would diverge badly...
Jul
20
comment An English question for a logical term
Well, be fair, the three google results are: this thread, the other thread you linked to, and a paper which has the exact phrase "...depend only on the presence, in the tuple, of implications...". It looks like no one uses the term "tuple of implications", per se.
Jun
17
comment How to compute this integral involving sech?
I think you might want to consider the stationary phase approximation...or method of steepest descent, whichever (I always get them confused!).
Jun
17
comment How to compute this integral involving sech?
What have you tried? (And is $\epsilon$ "small and positive"?)
Jun
17
revised How to compute this integral involving sech?
Updated TeX formatting slightly
Jun
17
suggested approved edit on How to compute this integral involving sech?