yoyostein
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 1d comment Confused about order in Opposite Algebra @Unfortunately there is no definition. $\phi(b)\in\text{End}_F(M)$ so all we know is it acts on $M$ (from the right). 2d comment Is the following an unordered selection with or without repetition? Yes it is- in the sense that the order matters Apr 30 comment “Clear” reason why open sets in weak topology is unbounded Nice intuitive answer. Upvoted Apr 29 comment What is the motivation for $l^p$ space? Apr 29 comment Query on Tensor Product of Quaternion Algebras Very nice answer to something that puzzled me for weeks. Apr 29 comment Query on Tensor Product of Quaternion Algebras Thanks! I didn't know (1). Even Wikipedia (en.wikipedia.org/wiki/Tensor_product_of_algebras) doesn't mention that every element $C$ must commute with $D$! Apr 29 comment Tensor product (confusing question) Upvoted, thanks. I changed the question to $ST$ a basis, sorry for the typo. Apr 29 comment When is tensor product isomorphic to product? Thanks for your excellent answer! Apr 29 comment My formula for sum of consecutive squares series? It is interesting Apr 29 comment Does there exist $P$ such that $PP^{\dagger}=\left(\begin{array}{cc} I & 0\\ 0 & -I \end{array}\right)$? Are complex number entries allowed? Apr 28 comment If f*g is Riemann integrable, g continuous, nonzero and bounded, show that f is Riemann integrable @Arthur Upvoted, you beat me to the answer! Apr 28 comment Matrices Eqvialence Relation Yes, thanks. Will change it Apr 28 comment Logic - Binomial Theorem I believe there is an answer here: math.stackexchange.com/questions/11601/… Apr 28 comment Proof that there are infinitely many primes (Euclid) When you learn topology, try reading Furstenberg's topological proof of infinite primes! Apr 27 comment Matrix that satisfies polynomial $x^{n}-1$ is diagonalizable @Omnomnomnom Shouldn't it be every eigenvalue is a root of the minimal polynomial and thus $p$, but not every root of $p$ is an eigenvalue? Apr 27 comment Matrix that satisfies polynomial $x^{n}-1$ is diagonalizable Update: $p$ isn't necessarily the characteristic polynomial Apr 27 comment Matrix that satisfies polynomial $x^{n}-1$ is diagonalizable Wait... How do we know the eigenvalues are precisely the roots of $p$? ($p$ is not necessarily the characteristic polynomial here, sorry for the confusing notation) Apr 27 comment Matrix that satisfies polynomial $x^{n}-1$ is diagonalizable Ok I think I understand. Apr 27 comment Probablity of Coin flipping. I think the denominator should be $(0.5)^3+0.5$. Apr 27 comment How to find scaling to get minimum positive integer proportion? @Hajar I believe what you need is: mathworks.com/matlabcentral/newsreader/view_thread/240937