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May
17
awarded  Revival
Apr
8
answered local homology group
Apr
6
answered Show that degree of constant map is zero
Apr
6
answered Simplicial homology for n-simplex
Oct
29
awarded  Yearling
Oct
26
revised Exceptional locus of birational morphism is a divisor.
deleted 27 characters in body
Jul
14
asked Exceptional locus of birational morphism is a divisor.
Jul
2
awarded  Curious
Jun
26
revised The Picard group doesn't change if we add the affine line
Changed x's for \times
Jun
26
suggested approved edit on The Picard group doesn't change if we add the affine line
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 approved 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 approved edit on Yoneda's lemma to prove $f^*(\tilde M) \cong \widetilde{B\otimes _A M}$