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 Apr 2 asked Norm in double dual Apr 1 accepted Is there something that attains the operator norm Apr 1 asked Is there something that attains the operator norm Mar 31 asked What is the error in this proof about compact operators? Mar 31 awarded Yearling Mar 31 accepted How to prove this integral operator is bounded Mar 31 comment How to prove this integral operator is bounded @Math1000 yes you are right Mar 31 accepted Is every subset of a precompact set also precompact? Mar 30 asked Is every subset of a precompact set also precompact? Mar 29 comment Determine whether each of these combinations of R 1 and R 2 must be an equivalence relation. I wrote some details on intersection. Hope it helps Mar 29 revised Determine whether each of these combinations of R 1 and R 2 must be an equivalence relation. added 276 characters in body Mar 29 answered Test of question Mar 29 answered Why are mathematicians so interested in finding out the gaps between primes and the distribution (randomness) in primes? Mar 29 answered Determine whether each of these combinations of R 1 and R 2 must be an equivalence relation. Mar 29 comment Show $\mathbb {R}[x,y]/(y^2-x, y-x)$ is not an integral domain $y(y-1)=0$ hence it is not a domain? Mar 29 comment A curious property of $\operatorname{frac}(e\cdot k)$ Could it be the repetition of 1828 in 2.718281828? Mar 29 answered How do I convert an index for a one-dimensional array into x and y? Mar 28 revised How to prove this integral operator is bounded added 77 characters in body Mar 28 comment How to prove this integral operator is bounded @AccidentalFourierTransform It does look similar, however Hilbert integral integration is from negative infinity to infinity. Mar 28 asked How to prove this integral operator is bounded