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5h
reviewed Approve suggested edit on Are the higher homotopy groups of the Hawaiian earring trivial?
7h
answered A convergence issue
11h
comment A convergence issue
From your definition of $l^2_{k^{-2}}$ it looks as though every element of $l^2$ belongs to this space. And therefore $l^2_{k^{-2}} = l^2$. Is that really what you meant?
Apr
14
comment What are the areas of modern math?
You are welcome.
Apr
14
comment What are the areas of modern math?
I think the best answer is to refer you to the Mathematics Subject Classification. If people try answering this question it seems like it would turn into a popularity contest. Anyway, voting to close as I don't think it's an appropriate question.
Apr
13
comment References for von Neumann Algebras
Not an expert, but I'd say Takesaki vol. 2 is a good place to start.
Apr
12
awarded  Popular Question
Apr
2
comment A question on limit of weak-* convergence of probability measures
Still not research level. This belongs on math.stackexchange.
Apr
2
comment A question on limit of weak-* convergence of probability measures
The answer is no, but I don't think this is a research level question.
Mar
29
answered Introducing a dual space structure
Mar
26
comment non-negativity to positivity
+1 for the username
Mar
26
reviewed Approve suggested edit on Are there uncountably many cube-free infinite binary words?
Mar
25
reviewed Approve suggested edit on Order homomorphism functions on $\omega_1$
Mar
24
reviewed Approve suggested edit on What is the time complexity of approximated SVD
Mar
24
revised Infinite tensor product of states
deleted 1 characters in body
Mar
23
answered Infinite tensor product of states
Mar
22
reviewed Approve suggested edit on Which functions are Wiener-integrable?
Mar
21
comment A “coarse” version of position operator and its properties
@physicalmaths: it's the Fourier transform, suitably normalized to make it unitary. I think the formula for $P$ is a typo, it should just be $P = U^* Q U = s(p)$.
Mar
21
reviewed Approve suggested edit on Is $\int_0^\infty \sin(Kx)f_K(x)\,dx$ of larger order than $\int_0^\infty \cos(Kx)f_K(x)\,dx$?
Mar
20
comment A “coarse” version of position operator and its properties
There's no general definition of the commutator of two unbounded operators, and in this case I really don't see any sensible way to interpret your $[Q,P]$.