3,011 reputation
1223
bio website tau.ac.il/~borovoi
location Tel Aviv, Israel
age
visits member for 5 years, 5 months
seen 27 mins ago

I am a professor at Tel Aviv University, interested in linear algebraic groups, homogeneous spaces, number theory and nonabelian cohomology.


24m
comment Matrix from a homomorphism of simply connected groups
Thank you, Jim! However, I would appreciate if you add details of your calculation. Do you use the Cartan's matrices for $H$ and for $G$? I would like to repeat the calculation starting from an orthogonal representation of another group.
1h
accepted Matrix from a homomorphism of simply connected groups
11h
revised Matrix from a homomorphism of simply connected groups
added 49 characters in body
11h
comment Matrix from a homomorphism of simply connected groups
Thank you, Jason. I indeed want "here is how I would try to it", also for some orthogonal representation of another group $H$. However, I have in mind another kind of approach: to use somehow tables from Bourbaki or from Onishchik and Vinberg, and I don't know how to use those tables for my question...
12h
asked Matrix from a homomorphism of simply connected groups
12h
comment Involutive automorphisms of a finite abelian p-group
By the way, if you like a question, you can vote it up (and if you dislike it, you can vote it down). You have not cast any votes!
12h
accepted Involutive automorphisms of a finite abelian p-group
12h
revised Involutive automorphisms of a finite abelian p-group
added 1 character in body
14h
comment Involutive automorphisms of a finite abelian p-group
Do you mean that the conjugacy class of $B$ is an invariant of the isomorphism class of $A$? And could you add references?
15h
comment Involutive automorphisms of a finite abelian p-group
Thank you, Ehud. I would appreciate if you include this in your answer.
16h
revised Involutive automorphisms of a finite abelian p-group
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17h
asked Involutive automorphisms of a finite abelian p-group
Jul
20
revised Torsors trivializing over a fixed finite etale cover
added 234 characters in body
Jul
19
answered Torsors trivializing over a fixed finite etale cover
Jun
26
accepted Permutation covering of a $G$-lattice
Jun
26
comment Permutation covering of a $G$-lattice
@FriederLadisch: You write: "It is, however, well known that the group ring of a $p$-group over a field of characteristic $p$ or over a local ring with residue field of characteristic $p$ is local." Could you please give a reference? Many thanks in advance,
Jun
26
comment Permutation covering of a $G$-lattice
Excellent!Thank you!
Jun
25
revised Permutation covering of a $G$-lattice
edited tags
Jun
25
revised Permutation covering of a $G$-lattice
edited tags
Jun
25
asked Permutation covering of a $G$-lattice