597 reputation
313
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location China
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visits member for 1 year, 3 months
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I am a student studying mathematics.


Dec
11
awarded  Caucus
Dec
2
awarded  Excavator
Dec
2
revised measure of the image of the the unit open disc by a holomorphic map
deleted 1 character in body
Sep
29
awarded  Inquisitive
Sep
24
awarded  Autobiographer
Sep
19
awarded  Yearling
Sep
9
awarded  Enthusiast
Jul
2
awarded  Curious
Jun
20
revised Fundamental group of the special orthogonal group SO(n)
added 51 characters in body
Jun
20
answered Fundamental group of the special orthogonal group SO(n)
Jun
8
comment Is Fredholm operator always a closed map?
Oh, I mean one that maps closed set to a closed one.
Jun
8
comment Is Fredholm operator always a closed map?
I don't think your claim is true, since in the definition of Fredholm operator, we usually need to assume the image $f(A)$ is closed in $F$.
Jun
8
asked Is Fredholm operator always a closed map?
May
10
revised The limit of the derivative of an increasing and bounded function is always $0$?
edited title
May
10
accepted The limit of the derivative of an increasing and bounded function is always $0$?
May
10
asked The limit of the derivative of an increasing and bounded function is always $0$?
May
6
revised Positive function approximation
added 2 characters in body
May
6
asked Positive function approximation
Apr
15
accepted Is the dual of a complete topological vector space always complete?
Apr
15
comment Is the dual of a complete topological vector space always complete?
What is $\sigma (X,X^*)$? Also, just now I found an exercise in a functional analysis book says that if the topology of $X$ is induced by (countably many) seminorms, then $X′$ is complete (even true when $X$ is not complete). Anyway, thank you!