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Nov
16
awarded  Yearling
Nov
13
awarded  Notable Question
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
Mar
7
comment pseudoinverse under change of norm
I have completely rewritten the question.
Mar
7
revised pseudoinverse under change of norm
complete rewrite
Mar
7
accepted What can be said about the minimizer of $\| b - A x \| ^2+ \| x \|^2$?
Mar
7
asked pseudoinverse under change of norm
Mar
7
asked What can be said about the minimizer of $\| b - A x \| ^2+ \| x \|^2$?
Mar
6
asked Mappings preserving convex polyhedra
Mar
4
comment An variation of “Lk” in simplicial complexes
@StefanH.: Yes, thanks.