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revised Number of subsets of $\{0,1,2,…,9\}$ with symmetric difference $\leq 2$
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1d
answered Number of subsets of $\{0,1,2,…,9\}$ with symmetric difference $\leq 2$
May
24
revised If I know the order of every element in a group, do I know the group?
added 9 characters in body
May
24
awarded  Nice Answer
May
24
answered If I know the order of every element in a group, do I know the group?
May
24
comment Classifying the central product HK of two cyclic groups
That's it, yes!
May
24
comment Set theory, intersection of two sets
There are infinitely many primes which are congruent to $1 \pmod{8}$, see en.wikipedia.org/wiki/… So what exactly is it required from you?
May
24
comment Is it possible to develop function that returns the number (rank, position) of a particular permutation.
$b_{7} b_{6} \dots b_{1} b_{0} \mapsto b_{7} \cdot n^{7} + b_{6} \cdot n^{6} + \dots + b_{0}$ if each $b_{i}$ takes $n$ values
May
24
revised Is it possible to develop function that returns the number (rank, position) of a particular permutation.
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May
24
revised Is it possible to develop function that returns the number (rank, position) of a particular permutation.
added 19 characters in body
May
24
answered Is it possible to develop function that returns the number (rank, position) of a particular permutation.
May
24
comment How to find the recurrence relation from a given polynomial?
en.wikipedia.org/wiki/…
May
24
answered all abelian groups with 625 elements with 24 elements of order 5
May
24
answered Classifying the central product HK of two cyclic groups
May
19
answered If $G=S_4, N=\{e;(1,2)(3,4);(1,3)(2,4);(1,4)(2,3)\}$ show that $N\lhd G$
May
18
comment Orbit Stabilizer problem (I think)
Thanks. I should add that @Andrew's comment points to an even slicker proof (which is equivalent to the one I linked to), that is, $G_{\alpha} G_{\beta}$ cannot take $\alpha$ to $\beta$.
May
18
revised Orbit Stabilizer problem (I think)
added 351 characters in body
May
18
revised Orbit Stabilizer problem (I think)
added 84 characters in body
May
18
answered Orbit Stabilizer problem (I think)
May
17
comment character tables and solubility
+1, excellent answer. I have taken the liberty to do a little LaTeX editing.