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Aug
8
revised Completeness of space of $k$-times differentiable functions from $\Bbb R^n$ to $\Bbb R$
edited title
Aug
7
comment Is this proof that $\lim_{n \to \infty} (1+1/n)^n$ exists (1) new, (2) interesting?
Hope you didn't find my edit too invasive. @Batominovski I second Quinn
Aug
7
revised Is this proof that $\lim_{n \to \infty} (1+1/n)^n$ exists (1) new, (2) interesting?
TeXing. Formatting.
Aug
6
revised $A:X \to Y$- linear continuous function, $A\neq 0$ $H=\ker A\implies \exists z \in H^{\bot}: \|z\|=1$
added 2 characters in body; edited title
Aug
6
answered Lagrange's identity in the complex form
Aug
6
comment Clarification on a step in the proof of Lagrange's identity for complex numbers.
Related
Aug
6
revised Lagrange's identity in the complex form
deleted 1 character in body
Aug
6
revised Conjugate in Cauchy-Schwarz Inequality for Complex Numbers
More descriptive title.
Aug
4
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 $D_k f(a)=0$.
Aug
2
reviewed Leave Open How to find triple integral of the following question?
Aug
2
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.
Aug
2
reviewed Leave Open Question about conditional probability
Aug
2
reviewed Close Continuous but not uniformly continuous example
Aug
2
reviewed Close Solve $x,y\in \mathbb{Z}$
Aug
2
reviewed Close prove that $\displaystyle\lim_{x \to a}(h_1(x)+h_2(x))f(x)$
Aug
2
reviewed Leave Open Logarithmic Integral II
Aug
2
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.