bio  website  mat.ulaval.ca/hchapdelaine/… 

location  Quebec city  
age  36  
visits  member for  3 years, 3 months 
seen  2 hours ago  
stats  profile views  3,079 
2d

comment 
Why Cech cohomology does not compute sheaf cohomology on an open annulus
Thanks for the explicit solution involving the log! 
2d

comment 
Why Cech cohomology does not compute sheaf cohomology on an open annulus
Thanks Denis for clearing away my confusion. 
2d

accepted  Why Cech cohomology does not compute sheaf cohomology on an open annulus 
2d

asked  Why Cech cohomology does not compute sheaf cohomology on an open annulus 
Apr 9 
awarded  Popular Question 
Apr 8 
awarded  Nice Question 
Mar 12 
comment 
A simple proof that parallelizable oriented closed manifolds are oriented boundary?
Yes indeed, once one deals with this case, then one may look at a quotient of $G$ by a discrete subgroup $\Gamma\subseteq G$. Then any frame on $G$ may be pushed down to a frame on $G/\Gamma$ 
Mar 7 
asked  A simple proof that parallelizable oriented closed manifolds are oriented boundary? 
Mar 5 
comment 
Boundary of fibers of submersions
So I thought about the example about the solid cylinder in $R^3$ (of length $1$) along the $x$axis and center at $(0,0,0)$ where $f$ is the distance between the projection of a point $P$ on $x$ and $(0,0,0)$. But I found this example a bit artificial since in this case, $N$ is really just $[1/2,1/2]$ since the fibers outside this interval are empty. But now I just realize that one may identify the two end points of that interval to get a circle. Ok, I see so anything can happen. I guess this answers my question. 
Mar 5 
revised 
Boundary of fibers of submersions
added 39 characters in body 
Mar 5 
revised 
Boundary of fibers of submersions
added 2 characters in body 
Mar 5 
revised 
Boundary of fibers of submersions
edited tags 
Mar 4 
asked  Boundary of fibers of submersions 
Feb 19 
accepted  Algebraic Hodge decomposition of CM abelian varieties 
Feb 19 
comment 
Algebraic Hodge decomposition of CM abelian varieties
I see, so hee simply meant algebraic over the base field of the abelian variety. Thanks. 
Feb 19 
revised 
Algebraic Hodge decomposition of CM abelian varieties
added 1 characters in body 
Feb 19 
asked  Algebraic Hodge decomposition of CM abelian varieties 
Feb 6 
accepted  Higher Weierstrass points on curves of genus 3 
Feb 6 
comment 
Higher Weierstrass points on curves of genus 3
Thanks @abx, it is crystal clear now. 
Feb 6 
revised 
Higher Weierstrass points on curves of genus 3
deleted 42 characters in body 