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Apr
24
awarded  Good Question
Mar
31
awarded  Notable Question
Feb
26
awarded  Favorite Question
Jan
21
asked Universal property of tensor products / Categorial expression of bilinearity
Nov
16
awarded  Yearling
Nov
13
awarded  Notable Question
Sep
9
comment Formula for surface measure of spherical cap on $S^n$.
In the section 'hyperspherical cap', the wikipedia article gives a formula for the surface in terms of regularized incomplete beta functions. I wonder whether a single integral formula like for the volume, at the beginning of the same section, does exist.
Sep
8
comment Formula for surface measure of spherical cap on $S^n$.
I am specifically looking for formulas nicer than there.
Sep
8
asked Formula for surface measure of spherical cap on $S^n$.
Aug
15
asked What is $H^1([0,1]) \otimes H^1([0,1])$?
Jun
24
asked How to define polyhedra?
Jun
23
accepted Can all real/complex vector spaces be equipped with a Hilbert space structure?
Jun
23
revised Can all real/complex vector spaces be equipped with a Hilbert space structure?
added 159 characters in body
Jun
23
asked Can all real/complex vector spaces be equipped with a Hilbert space structure?
Jun
14
revised Is there a terminological difference between “sequence” and “complex” in homology theory
added 65 characters in body
Jun
14
asked Is there a terminological difference between “sequence” and “complex” in homology theory
May
7
revised Preconditioning and effects on precision of solution of LSE
corrected reference
May
3
asked Preconditioning and effects on precision of solution of LSE
Apr
5
comment Boundedness of a Solution Operator
@user17904: You need to show that for Sobolev space $H$ of sufficient regularity the trace from $H$ to $L^2(\partial\Omega)$ has closed range. Than a bounded right-inverse exists by functional analysis. Typically, you can prove surjectivity, say, by partition of unity, smoothing and an explicit construction.
Mar
20
revised fundamental theorem of linear inequalities
added 336 characters in body