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Jan
15 |
awarded | Nice Answer |
Jan
4 |
comment |
Generalization of $(HK:H)=(K:H\cap K)$
As you might have already noticed, you don't need $H$ to normalize $K$ for (*) to hold, only for the two groups to permute setwise. |
Dec
8 |
answered | f vectors of simplicial complexes homeomorphic to n dimensional spheres |
Dec
4 |
awarded | Yearling |
Jul
14 |
awarded | Necromancer |
Jul
13 |
awarded | Revival |
Jul
13 |
comment |
Generating random finite groups
It's not clear to me that the procedure described above wouldn't favor certain isomorphism classes. The original question wanted an equal chance at each isomorphism class of groups of order $n$. |
Jul
13 |
comment |
Generating random finite groups
Indeed, GAP even knows the count of these groups with NumberSmallGroups (but it won't let you get at the groups themselves via the SmallGroups library). |
Jul
13 |
answered | Generating random finite groups |
May
15 |
answered | Is there a (satisfying) proof that cellular cohomology is isomorphic to simplicial cohomology that doesn't use relative cohomlogy? |
Apr
12 |
awarded | Necromancer |
Feb
5 |
comment |
Making spheres shellable
Is the difference with the Adiprasito and Benedetti theorem in the nature of the allowed subdivisions? They only look at derived subdivisions. |
Feb
5 |
answered | Making spheres shellable |
Dec
4 |
awarded | Yearling |
Oct
5 |
answered | Flag complexes that are shellable but not vertex decomposable |
Sep
24 |
awarded | Autobiographer |
Aug
30 |
comment |
Generalization of a theorem of Øystein Ore in group theory
There's also Roland Schmidt's nice book "Subgroup lattices of groups", which goes into a bit more depth on most of these and many related topics. |
Aug
12 |
comment |
The Wedge Sum of path connected topological spaces
Link to amazon webpage for Hilton and Wylie is here: amazon.com/Homology-Theory-Introduction-Algebraic-Topology/dp/… |
Jul
28 |
comment |
quasiprimitive non-solvable groups
John, that link looks wustl.edu specific. Try ams.org/mathscinet-getitem?mr=2661653 instead. (And no mathscinet access is required for that link.) |
Jul
7 |
comment |
Factor subset of finite group
@Geoff Robinson: Yes, sounds like a good place to look for a possible counterexample. |