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 Curious
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22h
comment Why “singular” in “singular homology/cohomology”?
Does the map needs to be continuous?
2d
awarded  Curious
2d
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 4 characters in body
2d
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 6 characters in body
2d
accepted A lemma from Hilton & Stammbach's book A Course in Homological Algebra
Feb
11
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 222 characters in body
Feb
11
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 222 characters in body
Feb
11
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 222 characters in body
Feb
11
revised A lemma from Hilton & Stammbach's book A Course in Homological Algebra
added 222 characters in body
Feb
11
asked A lemma from Hilton & Stammbach's book A Course in Homological Algebra
Feb
10
comment A problem of the definition of relative homology
The note by Prof. J. Michael Boardman help a lot since I never read something like this before. math.jhu.edu/~jmb/note/relhgy.pdf
Feb
9
comment Smooth maps on a manifold lie group
"It is obvious that matrix multiplication is a vector function, with polynomial coordinate functions , therefore it is a smooth function." Why such a vector function is a smooth function?
Jan
2
revised Tangent vectors in $\mathbb{R}^n$
deleted 1 character in body; deleted 78 characters in body
Jan
1
revised Tangent vectors in $\mathbb{R}^n$
added 19 characters in body
Jan
1
revised Tangent vectors in $\mathbb{R}^n$
deleted 52 characters in body
Jan
1
revised Tangent vectors in $\mathbb{R}^n$
deleted 5 characters in body
Jan
1
revised Tangent vectors in $\mathbb{R}^n$
added 1498 characters in body
Dec
31
comment Tangent vectors in $\mathbb{R}^n$
thank you so much. you really help me a lot. It is the second edition of this book, isn't it. I will read those material. I choose your answer for the best answer. thx
Dec
31
accepted Tangent vectors in $\mathbb{R}^n$
Dec
31
awarded  Informed