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Jun
12
revised Does every bijection of $\mathbb{Z}^2$ extend to a homeomorphism of $\mathbb{R}^2$?
added 368 characters in body
Jun
11
revised Does every bijection of $\mathbb{Z}^2$ extend to a homeomorphism of $\mathbb{R}^2$?
added 376 characters in body
Jun
11
revised Does every bijection of $\mathbb{Z}^2$ extend to a homeomorphism of $\mathbb{R}^2$?
added 376 characters in body
Jun
7
revised $A^2 B=A $ iff $B^2 A=B$
added 10 characters in body
May
31
revised Maximal order of elements of $\textrm{SL}(n, \mathbb{Z})$
added 312 characters in body
May
31
revised Maximal order of elements of $\textrm{SL}(n, \mathbb{Z})$
added 93 characters in body
May
27
revised Redundance of the Smoothness of the Inversion Map in the Definiton of a Lie Group.
added 290 characters in body
May
17
revised prove $p (\bigcup A_i) \leq \sum p (A_i) $
added 2 characters in body; edited title
Apr
12
revised Determine the units of the ring $A= \mathbb Z[X]/(X^3)$ and the structure of the group $A^*$
added 898 characters in body
Apr
2
revised Dual of a matrix lie algebra
added 23 characters in body
Mar
31
revised Let $|f(z)| \to \infty$ as $|z| \to \infty$, prove that $f(\mathbb{C})= \mathbb{C}$?
deleted 39 characters in body
Mar
27
revised Elementary proof that $\sum_{n \geq 1} \frac{(-1)^n}{\sqrt{n}}+i \frac{1}{n^2}$ is conditionally convergent.
This question isn't about complex analysis.
Mar
25
revised Every nilpotent left ideal is contained in a nilpotent 2 sided ideal.
added 1 character in body
Mar
23
revised Reducibility of $P(X^2)$
I added an invisible string of characters at the end of your answer, this allows me to change my initial mistaken downvote into an upvote.
Mar
23
revised Where did mathematicians learn how to do truth tables?
I added an invisible string of characters at the end so that I may undo an erroneous downvote.
Mar
20
revised Why is $\ker\omega$ integrable iff $\omega\wedge d\omega=0$?
added 4 characters in body
Mar
19
revised Lie group. How is manifold defined?
added 738 characters in body
Mar
16
revised Equilateral triangle in a circle
added 137 characters in body
Mar
14
revised Understanding an example from Hatcher - cellular homology
added 717 characters in body
Mar
8
revised Why is $\deg(f)$ well-defined?
edited body