2,204 reputation
1041
bio website
location Santiago, Chile
age 24
visits member for 2 years, 10 months
seen 18 hours ago

I'm an undegraduate math student in Pontificia Universidad Católica de Chile.


Mar
12
awarded  Notable Question
Mar
10
awarded  Good Question
Feb
26
awarded  Popular Question
Feb
4
awarded  Popular Question
Jan
31
comment Universal property of sheafification
Thanks for your answer.
Jan
31
accepted Universal property of sheafification
Jan
29
comment Does presheaf send the empty set to zero?
A functor in the generic case does not preserve initial objects. I think one needs to define a sheaf as a contravariant functor which sends the empty set in a trivial group.
Jan
28
asked Universal property of sheafification
Jan
28
comment Does presheaf send the empty set to zero?
Why F must preserve the terminal object?, F is just a contravariant functor.
Jan
28
reviewed Approve Show that this equation together with the boundary conditions $u(0) = 2, u(\pi) = 0$ has no solution
Jan
4
comment Is $B = \{x:x \notin B\}$ a valid paradox in Naive Set Theory?
oops youre right
Jan
4
revised Is $B = \{x:x \notin B\}$ a valid paradox in Naive Set Theory?
edited body
Jan
3
comment Is $B = \{x:x \notin B\}$ a valid paradox in Naive Set Theory?
Why $B = \{x:x \notin B\}$? Did you mean $B^c$?
Dec
10
awarded  Caucus
Nov
29
reviewed Approve Basic problem in Mechanics
Nov
24
reviewed Approve Solve: $\sin x - y\cos x = z$ for $x$.
Nov
20
reviewed Approve Functions of sets
Nov
19
reviewed Approve Inclusion-Exclusion Question.
Nov
16
reviewed Approve How do I plot normal distribution
Nov
12
answered Field extensions and minimal polynomial