mathmansujo
Reputation
371
Next privilege 500 Rep.
Access review queues
 Oct12 accepted Question regarding morphism of ringed spaces Oct8 accepted Computing the homology of a triangle with the edges identified in cyclic order Oct8 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. Oct8 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? Oct8 answered Does $f(x)=ax$ intersect $g(x)=\sqrt{x}$ Oct8 asked Computing the homology of a triangle with the edges identified in cyclic order Sep17 revised Frobenius splitting from viewpoint of commutative algebra added 18 characters in body Sep17 asked Frobenius splitting from viewpoint of commutative algebra Sep4 asked question about gradation of a ring Aug28 accepted If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity Aug28 revised If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity edited body Aug28 asked If $R\rightarrow S$ is faithfully flat then show that it is pure, and reference for purity Jul14 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. Jul13 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. Jul2 awarded Curious Jun22 accepted every continuous map $S^1 \rightarrow S^1$ can be extended to continuous map $B^2 \rightarrow B^2$ Jun22 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? Jun22 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. Jun22 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? Jun22 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.