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Jan
4 |
comment |
Order of elements
This is the famous "r-s-t" problem assigned to first year graduate students at the University of Chicago out of Alperin-Bell, which intentionally contains many highly nontrivial problems mixed among the easy ones, older grad students are sworn to secrecy as to which are which. We all spent hours trying to solve it inside the symmetric group using multiple different special cases. Only one or two students in history were known to get it correct, and it is easier to do inside PSL. It saddens me to see the answer posted here. |
Nov
20 |
awarded | Nice Answer |
Sep
20 |
comment |
Non-isomorphic finite simple groups
The $A_8 \cong GL(4,2)$ example is well-known at the University of Chicago where it's an exercise in Alperin-Bell, the idea being students shouldn't know if an exercise is hard or easy in advance. That and the famous "rst" problem have tormented many a 1st year grad student. |
Jun
19 |
answered | Order of automorphism of Projective special linear group |
Jun
19 |
awarded | Critic |
Jun
14 |
comment |
searching for text for studying representation theory
I taught a 1-semester class for seniors/1st year grad students out of this book and they all really enjoyed it. It should be very suitable for self study as well. |
Jun
12 |
comment |
Heuristic argument that finite simple groups _ought_ to be “classifiable”?
Can someone explain the mysterious last sentence in this answer? |
May
30 |
answered | When (if ever) disclose your identity as a reviewer? |
Feb
24 |
awarded | Supporter |
Feb
24 |
answered | indecomposable modules of the symmetric group |
Feb
20 |
awarded | Editor |
Feb
20 |
revised |
Restrictions of Modules and Dimensions
deleted 4 characters in body |
Feb
20 |
answered | Restrictions of Modules and Dimensions |
Jun
29 |
awarded | Necromancer |
Jun
15 |
awarded | Teacher |
Jun
15 |
answered | What are some examples of colorful language in serious mathematics papers? |