4,099 reputation
127
bio website wikipedia.org
location iya
age 25
visits member for 1 year, 7 months
seen yesterday

French PhD student.

Main fields of interest :

  • Mathematical Physics ;

  • Homotopy categories ;

  • Algebraic Geometry ;

  • Operads.


Aug
26
comment Summation of exponential series
A first step would be to guess the limit. What could it be?
Jul
29
comment A hard Conformal Mapping problem
It does… Then find a conformal mapping from the half disk to the disk.
Jul
29
answered Complex equations with no complex solutions?
Jul
28
comment Support of the pullback module
Well, in the affine case, I tryed to write $\mathrm M$ as the sum of its finitely generated submodules $\sum M_i$. But I am unable to show that $A/I \otimes M_i \to A/I \otimes M$ is injective.
Jul
28
asked Support of the pullback module
Jul
25
comment Support of a module with extended scalars
Would we obtain the same answer without the assumption that $M$ is finetely generated but knowing that $Tor_S(M,R) = 0$?
Jul
2
awarded  Curious
May
5
reviewed Approve suggested edit on Area in Polar Coordinates
May
5
reviewed Approve suggested edit on Number of relations from $A$ to $B$
May
4
reviewed Approve suggested edit on Intuition behind arc length formula
May
4
asked Compactly supported Dolbeault Cohomology: is this True?
Mar
21
reviewed Approve suggested edit on proving an isomorphism of direct limits
Mar
20
comment Definition of locally presentable category
Lurie's definition in HTT says : "$\mathcal C$ has small colimits + There is a small set $S$ made of small objects + every object in $\mathcal C$ may be obtained as the colimit of a small diagram taking values in $S$"
Mar
19
accepted Definition of locally presentable category
Mar
18
asked Definition of locally presentable category
Feb
20
accepted Why is it crucial that $\kappa$ is a regular cardinal in the definition of $\kappa$-accessible categories?
Feb
19
answered When does cohomology take pullbacks to pushouts?
Feb
19
comment Why is it crucial that $\kappa$ is a regular cardinal in the definition of $\kappa$-accessible categories?
Ok, so the conclusion is that all the definitions work fine with singular cardinals.
Feb
19
reviewed Approve suggested edit on Are there complete Graeco-Latin squares?
Feb
19
comment Why is it crucial that $\kappa$ is a regular cardinal in the definition of $\kappa$-accessible categories?
I think the answer to your first question is "no". For $\kappa < \lambda$ both regular, $\kappa$-accessibility doesn't necessarily imply $\lambda$-accessibility. I agree that in practice it is super easy to change $\kappa$ and use $\kappa^+$. So the question is philosophical. Where do we use this assumption?