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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?
Related: math.stackexchange.com/questions/843108/…
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