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Nov
19
asked Hilbert-Schmidt Operator
Nov
7
revised Showing the basis of a Hilbert Space have the same cardinality
deleted 7 characters in body
Nov
7
comment Showing the basis of a Hilbert Space have the same cardinality
@martini oh dear, just looked it over, I stopped halfway through and then continued on and used different notation by mistake, sorry . thanks for the comment
Nov
7
revised Showing the basis of a Hilbert Space have the same cardinality
edited body
Nov
7
asked Showing the basis of a Hilbert Space have the same cardinality
Nov
6
accepted Non-closed compact subspace of a non-hausdorff space
Nov
6
comment Non-closed compact subspace of a non-hausdorff space
Thanks for the help (I should have realised that any topology with finitley many open sets is compact- but I didn't and it was a helpful point, so thanks) Thanks for the second example too, it really helped
Nov
6
asked Orthonormal Family in a Hilbert Space
Nov
4
asked Non-closed compact subspace of a non-hausdorff space
Oct
30
asked Showing that $\bigcap_{n=1}^{\infty}V_n\neq \emptyset$
Oct
30
comment Can one come to prove Cantor's theorem (existence of higher degree of infinities) FROM Russell's paradox?
ZF is zermelo frankelen set theory. So just a suitable axiom system that does not allow us to define sets that are "too big"
Oct
30
revised Can one come to prove Cantor's theorem (existence of higher degree of infinities) FROM Russell's paradox?
added 1 characters in body
Oct
30
answered Can one come to prove Cantor's theorem (existence of higher degree of infinities) FROM Russell's paradox?
Oct
29
revised Proving a sum using induction
adding in + signs
Oct
29
suggested approved edit on Proving a sum using induction
Oct
29
accepted Closure w.r.t $|| . ||_\infty$
Oct
29
accepted Showing closure in the $\|\cdot\|_1$ norm
Oct
29
accepted The real numbers and the axiom of foundation
Oct
29
asked $f$ mapping open sets to open sets
Oct
26
awarded  Yearling