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Jun
21
comment showing $\int _a^b\left(f'\left(x\right)\right)dx\:=\:f\left(b\right)-f\left(a\right)$
@TonyPiccolo That's what he's asking
Jun
21
revised showing $\int _a^b\left(f'\left(x\right)\right)dx\:=\:f\left(b\right)-f\left(a\right)$
Fixing typos and formatting
Jun
12
comment Show: $M\subset\mathbb{R}^n$ Jordan-measurable, iff $vol^*(\partial A)=0$
Look at this
Jun
11
comment $\sqrt a$ is either an integer or an irrational number.
From your handout, when $n$ is not a perfect $k$th power, $\sqrt[k]{n}\not\in\Bbb Q$. What happen with $\sqrt[k]{r}$ for rational and positive $r$?
Jun
7
revised Induction on Real Numbers
I was using $\lfloor \cdot \rfloor$ as fractional part which was a mistake now corrected
Jun
7
revised Multiplicative nature of the separability degree
deleted 1 character in body
Jun
4
answered Why doesn't mathematical induction work backwards or with increments other than 1?
Jun
3
revised If $AB = I$ then $BA = I$
Removing unnecessary argument.
Jun
1
revised Riemann-integrable functions and pointwise convergence
edited body
May
26
revised A singular $n-$cube and a circumference defined the border than 2-cube
spelling grammar formatting
May
23
answered If $AB = I$ then $BA = I$
May
19
revised What is the value of $\tan(A)/\tan(B)$?
formatting
May
19
revised Does the series $\sum_{n\ge0}\frac{x^n\sin({nx})}{n!}$ converge uniformly on $\Bbb R$?
Formatting
May
18
revised Proving that $AB-BA=cI$ for nontrivial $c \in \mathbb{C}$
typo
May
14
revised Some questions about Hilbert matrix
formatting
May
9
revised Proof of $\arctan{2} = \pi/2 -\arctan{1/2}$
Formatting.
May
4
revised Find a surjective function $f:B_n \rightarrow S^n$ such that $f(x)=f(y) \iff \|x\|=\|y\|$
added 4 characters in body
May
2
comment Showing that $\|f\|_p\to\|f\|_{\infty}$
Many times indeed. Click in here and then look at the Linked column
May
1
comment image of intersections of sets and equality with intersection of images.
If you only allow families with nonempty intersection then yes, it works for constant functions, but then it no longer is a characterization of injectivity.
May
1
comment image of intersections of sets and equality with intersection of images.
The equality in second statement is a characterization of injectivity.