bio  website  tau.ac.il/~borovoi 

location  Tel Aviv, Israel  
age  
visits  member for  5 years, 5 months 
seen  27 mins ago  
stats  profile views  2,241 
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 pgroup
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 pgroup 
12h

revised 
Involutive automorphisms of a finite abelian pgroup
added 1 character in body 
14h

comment 
Involutive automorphisms of a finite abelian pgroup
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 pgroup
Thank you, Ehud. I would appreciate if you include this in your answer. 
16h

revised 
Involutive automorphisms of a finite abelian pgroup
deleted 4 characters in body 
17h

asked  Involutive automorphisms of a finite abelian pgroup 
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 