bio  website  

location  Münster, Germany  
age  27  
visits  member for  5 years, 1 month 
seen  Jan 28 at 9:43  
stats  profile views  35,745 
I am interested in the interactions between algebraic geometry and category theory. More specifically, I "model" algebraic geometry on cocomplete symmetric monoidal categories.
Here is a link to my PhD thesis. Comments are welcome.
Email: [my last name] [at] unimuenster.de
2d

awarded  Popular Question 
Jan 28 
awarded  Nice Question 
Jan 21 
awarded  Nice Question 
Jan 19 
comment 
Is the functor of points of a scheme cofinally small?
Thank you for adding the second part. I still have to digest all this. In the first part, I think we have to be a little bit more careful as for the compatibility properties. Not every subring of $A$ such that the $B_n$ factors through localizations will induce a morphism. 
Jan 19 
comment 
Is the functor of points of a scheme cofinally small?
Ah, thank you! What about the 2nd question? 
Jan 19 
comment 
Is the functor of points of a scheme cofinally small?
Oh, I see. Thank you for the clarification. 
Jan 19 
revised 
Is the functor of points of a scheme cofinally small?
added 195 characters in body 
Jan 19 
comment 
Is the functor of points of a scheme cofinally small?
@Simon Henry: This is equivalent to the condition of being cofinally small. 
Jan 19 
comment 
Is the functor of points of a scheme cofinally small?
@Fernando: Well, this doesn't work. Not every morphism $\mathrm{Spec}(A) \to X$ factors through $\mathrm{Spec}(B)$ when $\mathrm{Spec}(B) \to X$ is an atlas. 
Jan 19 
asked  Is the functor of points of a scheme cofinally small? 
Jan 10 
comment 
Reference for “multimonoidal categories”
Thank you! I forgot one coherence axiom. 
Jan 10 
accepted  Reference for “multimonoidal categories” 
Jan 8 
awarded  Nice Question 
Jan 8 
awarded  Nice Question 
Jan 8 
comment 
Canonical presentation of promodules over prorings
Oh yes, thank you for reminding me that this was answered. 
Jan 8 
accepted  Canonical presentation of promodules over prorings 
Jan 8 
asked  Reference for “multimonoidal categories” 
Jan 7 
comment 
Nonabelian Grothendieck group
Thank you for your answer! 
Jan 7 
comment 
Nonabelian Grothendieck group
Thank you for your answer! 
Jan 7 
accepted  Nonabelian Grothendieck group 