361 reputation
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visits member for 1 year, 7 months
seen Oct 15 at 16:02

Oct
12
accepted Question regarding morphism of ringed spaces
Oct
8
accepted Computing the homology of a triangle with the edges identified in cyclic order
Oct
8
comment Computing the homology of a triangle with the edges identified in cyclic order
@NajibIdrissi: Sorry to disturb you again, but can you kindly give me the definition of a delta complex, or suggest a proper reference for it, other than Hatcher? I think I am confused with the definition, because I can't understand your reasoning above.
Oct
8
comment Computing the homology of a triangle with the edges identified in cyclic order
@NajibIdrissi: Can you please clarify why the picture as given does not give a delta complex structure on the space?
Oct
8
answered Does $f(x)=ax$ intersect $g(x)=\sqrt{x}$
Oct
8
asked Computing the homology of a triangle with the edges identified in cyclic order
Sep
17
revised Frobenius splitting from viewpoint of commutative algebra
added 18 characters in body
Sep
17
asked Frobenius splitting from viewpoint of commutative algebra
Sep
4
asked question about gradation of a ring
Aug
28
accepted If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity
Aug
28
revised If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity
edited body
Aug
28
asked If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity
Jul
14
comment Why does the definition of an open subscheme / open immersion of schemes allow for an “extra” isomorphism?
Sir, can you kindly give some reference or give some idea on how to prove the the criterion for open immersion you have mentioned? I am in urgent need for the proof for my presentation.
Jul
13
comment The distinguished open sets are affine subschemes
@GeorgesElencwajg: Sir, can you kindly give any reference to the equivalence stated in second paragraph? I am in urgent need of knowing the proof.
Jul
2
awarded  Curious
Jun
22
accepted every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$
Jun
22
comment every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$
you are suggesting the composition $B^2 -0 \rightarrow S^1\rightarrow S^1\rightarrow B^2$, but I do not understand the last map $S^1\rightarrow B^2$. Can you explicitly state the map?
Jun
22
comment every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$
It might be obvious and I might be dumb, but can you still point out which continuous maps you are composing for the map from $B^2 - 0$? that is where I am facing difficulty.
Jun
22
comment every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$
@Vladimir : I cannot show that the map is continuous by ϵ−δ argument. It seems that two nearby points inside the disk may get mapped to distant points by my map. Can you explain why you think it works?
Jun
22
comment every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$
actually I am reading the book by Massey, and the question is given without introducing the theorems used in the proof. There should be an easier explanation to this question without using big theorems. If you can find some explicit map or easier argument, then it will be very helpful for me.