416 reputation
111
bio website
location
age 20
visits member for 1 years, 5 months
seen yesterday

Apr
13
comment Let $A$, $B$ be subsets of $S^n, n≥2$. Show that if $A$ and $B$ are closed, disjoint, and neither separates $S^n$, then…
I don´t think I'm using reduced homology in any part, the Mayer-Vietoris sequence is for the unreduced case.
Apr
13
answered Let $A$, $B$ be subsets of $S^n, n≥2$. Show that if $A$ and $B$ are closed, disjoint, and neither separates $S^n$, then…
Apr
11
answered Simple exercise in cohomology
Apr
10
awarded  Revival
Apr
5
revised Principal divisors
Fixed typos
Apr
5
suggested suggested edit on Principal divisors
Jan
20
revised twisting sheaf on projective space
fixed notation
Jan
18
comment Question from Liu, Chapter 5 Ex 1.16
You can find the proof of Benja's assertion on Harshtorne's Chapter II Section V.
Jan
18
revised Yoneda's lemma to prove $f^*(\tilde M) \cong \widetilde{B\otimes _A M}$
grammar and notation
Jan
18
suggested suggested edit on Yoneda's lemma to prove $f^*(\tilde M) \cong \widetilde{B\otimes _A M}$
Jan
17
answered twisting sheaf on projective space
Jan
8
asked Does 2 manifolds can be “isotoped away”?
Dec
6
awarded  Excavator
Dec
6
revised Ambient Isotopy
fixed name of author
Dec
6
suggested suggested edit on Ambient Isotopy
Dec
5
answered prove that $|G|$ is even if $g=g^{-1} $, for all $g \in G$
Dec
1
awarded  Yearling
Dec
1
revised Motivation for a proof “In a regular space, if every open cover contains a countably locally finite open refinement, then the space is paracompact”.
fixed typos
Dec
1
answered Is $(x)$ a maximal ideal in $\mathbb{Z}[x]$?
Dec
1
suggested suggested edit on Motivation for a proof “In a regular space, if every open cover contains a countably locally finite open refinement, then the space is paracompact”.