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Dec
23
awarded  Socratic
Dec
22
comment An exercise from Stein's Fourier analysis about wave equation
I think on Stein's book, it contains a method to solve wave equation (nameyly, via Fourier transform).
Dec
22
revised (Co)different ideal is divisorial?
added 25 characters in body
Dec
22
revised (Co)different ideal is divisorial?
added 97 characters in body
Dec
22
comment Introduction to Real Analysis (Proof Based Course) Spivak vs Baby Rudin?
Sophomore? Baby Rudin, or Zorich if you like.
Dec
22
revised (Co)different ideal is divisorial?
added 343 characters in body
Dec
22
revised (Co)different ideal is divisorial?
added 343 characters in body
Dec
22
revised (Co)different ideal is divisorial?
edited body
Dec
22
comment Show that every sequence in $\mathbb{R}$ has a monotone subsequence
@SirJective It's in fact, a special case of infinite Ramsey theorem‌​, a combinatorial stuff.
Dec
22
revised (Co)different ideal is divisorial?
added 4 characters in body
Dec
22
revised (Co)different ideal is divisorial?
added 281 characters in body
Dec
22
asked (Co)different ideal is divisorial?
Dec
20
comment Reference request: Chern classes in algebraic geometry
There IS Chern-Weil in an appendix of Milnor's book, latest edition.
Dec
18
accepted Tychonoff's theorem for products of finite discrete topologies?
Dec
17
revised Tychonoff's theorem for products of finite discrete topologies?
added 582 characters in body
Dec
17
comment Tychonoff's theorem for products of finite discrete topologies?
@ArthurFischer In some sense, the proof of existence of maximal ideals for commutative rings is very intuitive, and existence of algebraic closure, and existence of extension to splitting fields. I need to use it to extract something. I'll edit my post to include an example.
Dec
17
asked Tychonoff's theorem for products of finite discrete topologies?
Dec
17
accepted The Galois group of a composite of Galois extensions
Dec
16
revised Extending Morse-Smale pair from submanifolds?
added 190 characters in body
Dec
15
comment How do I know that an inverse of a matrix has the same type of Jordan canonical form
Could you please compute $A^{-1}$ when $A$ is a Jordan block and see how it's like?