731 reputation
21322
bio website iecl.univ-lorraine.fr/…
location Nancy, France
age 63
visits member for 4 years, 6 months
seen 54 mins ago

Email: pierre.yves.gaillard at gmail.com


1d
awarded  Nice Question
1d
revised a naive question about the second dual of a vector space
edit clearly indicated
2d
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  Self-Learner