bio  website  iecl.univlorraine.fr/… 

location  Nancy, France  
age  63  
visits  member for  4 years, 6 months 
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Email: pierre.yves.gaillard at gmail.com
1d

awarded  Nice Question 
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revised 
a naive question about the second dual of a vector space
edit clearly indicated 
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awarded  Announcer 
Apr 2 
comment 
a naive question about the second dual of a vector space
@TomLeinster  Dear Tom: Thanks a lot for your kind comment! Failing to prove your parenthetical remark, I did some googling, and found your paper Codensity and the ultrafilter monad, in particular Remark 7.6. I also found the links related to this paper on your webpage. Are these the good references for this fact? 
Apr 2 
asked  a naive question about the second dual of a vector space 
Apr 1 
comment 
Applications of the Chinese remainder theorem
@JohannesHahn  Dear Johannes: Thanks for your comment. I think it's much harder to put a matrix in JNF than to compute its exponential. I know no closed formula for the JNF. The exponential depends only on the minimal polynomial, which is a much coarser invariant than the JNF. 
Oct 8 
awarded  Constituent 
Oct 1 
awarded  Caucus 
Aug 11 
answered  Why are (pre)sheaves defined as contravariant functors? Why not just reverse the arrows in the first place? 
Aug 10 
answered  Taylor's theorem and the symmetric group 
Jul 29 
awarded  Nice Answer 
Jul 27 
revised 
Localizing an arbitrary additive category
minor change 
Jul 27 
answered  Localizing an arbitrary additive category 
Jul 26 
awarded  Informed 
Jul 15 
awarded  Excavator 
Jul 15 
revised 
Why are finitely generated modules over principal artin local rings direct sums of cyclic modules?
Pete kindly quoted a text of mine. I noticed an error in this text, removed it form the web, and removed the quotation from Pete's post. Sorry. 
Jul 15 
suggested  suggested edit on Why are finitely generated modules over principal artin local rings direct sums of cyclic modules? 
Jun 28 
awarded  Good Answer 
Jun 25 
awarded  Yearling 
Apr 3 
awarded  SelfLearner 