bio  website  tau.ac.il/~borovoi 

location  Tel Aviv, Israel  
age  
visits  member for  5 years, 1 month 
seen  yesterday  
stats  profile views  2,054 
I am a professor at Tel Aviv University, interested in linear algebraic groups, homogeneous spaces, number theory and nonabelian cohomology.
1d

comment 
Adeles and twisted adeles
Thank you! Unfortunately, I cannot accept two answers... 
Mar 24 
accepted  Adeles and twisted adeles 
Mar 24 
comment 
Adeles and twisted adeles
Dear jmc, many thanks! However, could you please add detais? To what is the tensoring functor left adjoint, and why it follows that this functor commutes with colimits? Please give references and, if possible, detailed explanations! 
Mar 24 
asked  Adeles and twisted adeles 
Mar 11 
comment 
The action of the center on the extended Dynkin diagram
Thank you, Jim! This is exactly what I needed! 
Mar 11 
accepted  The action of the center on the extended Dynkin diagram 
Mar 10 
asked  The action of the center on the extended Dynkin diagram 
Mar 9 
accepted  Conjugation of group extensions 
Mar 9 
comment 
Conjugation of group extensions
Excellent, Yves! Many thanks! 
Mar 8 
revised 
Conjugation of group extensions
deleted 106 characters in body 
Mar 8 
asked  Conjugation of group extensions 
Feb 25 
comment 
Exactness on rational points of algebraic groups
In characteristic 0 any morphism is separable and any isogeny is central. 
Feb 23 
revised 
Exactness on rational points of algebraic groups
added 4 characters in body 
Feb 23 
comment 
Exactness on rational points of algebraic groups
Since you write "Thank you for your answer", consider upvoting the answer. 
Feb 23 
comment 
Exactness on rational points of algebraic groups
The paper of Tits on abstract homomorphisms is not relevant here: you deal with algebraic homomorphisms. 
Feb 23 
comment 
Exactness on rational points of algebraic groups
The image of a homomorphism of algebraic groups is regarded over an algebraic closure. It is Zariski closed, see Borel's book. By definition, an isogeny is is a surjective homomorphism of algebraic groups with finite kernel. 
Feb 23 
revised 
Exactness on rational points of algebraic groups
added 587 characters in body 
Feb 23 
comment 
Reductive space & Reductive Lie algebra
What is a reductive space? 
Feb 22 
revised 
Exactness on rational points of algebraic groups
added 19 characters in body 
Feb 22 
revised 
Exactness on rational points of algebraic groups
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