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Apr
23
comment Subgroups of every order dividing the order of the group imply the group is abelian?
@Timbuc - I see your point. But this seems to answer only (2), can you also give an example for (1) ? thanks!
Apr
23
comment Groups with “few” subgroups
@mathmandan - Very interesting, I'll be sure to read it. thanks!
Apr
23
asked Subgroups of every order dividing the order of the group imply the group is abelian?
Apr
23
comment Groups with “few” subgroups
@mathmandan - How do you know such subgroups of $T$ exist ?
Apr
23
comment Groups with “few” subgroups
How do you know that $P$ exist ?
Apr
23
revised Solving a cubic equation $x^3+15x^2+24x-40=0$
rolled back to a previous revision
Apr
23
reviewed Approve A fun problem by Arnold using the Poincaré recurrence theorem
Apr
21
answered Find $\lim\limits_{n\rightarrow\infty}(n!)^{1/n^2}$
Apr
20
comment Finding all possible pairs of positive integer values
Because I can assume without loss of generality that x>=y (otherwise y>=x and we change their names ). I have used this in the first equation, the LHS is positive and by that assumption the RHS is also positive
Apr
19
comment Proofs shorter than the statement of the theorem
Does "this is a direct consequence of the previous theorem" counts? :-P
Apr
19
revised Finding all possible pairs of positive integer values
deleted 9 characters in body
Apr
18
answered If $4=5$, then $6=8\,$ (yes or no?)
Apr
18
answered Finding all possible pairs of positive integer values
Apr
18
revised Self contained book on Ricci Flow/Geometric Analysis
edited tags
Apr
18
reviewed Approve Simple equation re-arrangement
Apr
18
answered Is this permutations or combinations?
Apr
18
comment Combination formula?
Do you mean the number of ways arranging $n$ items ?
Apr
17
comment What would be a value of $X$ under an automorphism of $F(X)$ over $F$?
Why do you believe that $p,q$ have degree $1$ ?
Apr
17
accepted Quotient topology by identifying the boundary of a circle as one point
Apr
17
reviewed Close Introduction to proofs.