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2h
answered Let $f$ be differentiable at every point of some open ball $B(a)$ in $\mathbb R^n$ and $f(x)\le f(a) , \forall x \in B(a)$ , then prove $D_k f(a)=0$.
2d
reviewed Leave Open How to find triple integral of the following question?
2d
comment How to find triple integral of the following question?
For some basic information about writing math at this site see e.g. here, here, here and here.
2d
reviewed Leave Open Question about conditional probability
2d
reviewed Close Determination of polynomial values
2d
reviewed Close Continuous but not uniformly continuous example
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reviewed Close Solve $x,y\in \mathbb{Z}$
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reviewed Close linear algebra and solving has infinitely many solutions.
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reviewed Close prove that $\displaystyle\lim_{x \to a}(h_1(x)+h_2(x))f(x)$
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reviewed Leave Open Logarithmic Integral II
2d
comment Can we prove that matrix multiplication by its inverse is commutative?
Isn't this asking the same as this?
Jul
30
comment Is proving $m(E) < \epsilon, \forall \epsilon > 0$ equivalent to prove $m(E) = 0$?
@DavidC.Ullrich That looks like an answer.
Jul
30
comment Set-theoretic equality
The overlining is for the complementary set?
Jul
28
comment Residue integral: $\int_{- \infty}^{+ \infty} \frac{e^{ax}}{1+e^x} dx$ with $0 \lt a \lt 1$.
@tacos_tacos_tacos here is the same integral calculated using a rectangular contour.
Jul
26
revised Is there a proof for the maximum principle without the Cauchy integral theorem?
deleted 4 characters in body
Jul
26
revised A question about complex integration of $\frac{1}{p(z)}$
added 2 characters in body
Jul
26
answered A question regarding a proof in Ahlfors
Jul
26
answered Is there a proof for the maximum principle without the Cauchy integral theorem?
Jul
26
comment Is there a proof for the maximum principle without the Cauchy integral theorem?
@DanielFischer That's an answer :-)
Jul
26
comment A question about complex integration of $\frac{1}{p(z)}$
This is perfectly fine. And the reason why both integrals are equal is either by residues theorem or noting that those circles are homotopic.