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visits member for 4 years, 3 months
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Just a layman and slow learner. Thank you for your enlightenment and patience, and for giving me the best memory in my life.


Nov
24
asked If $T(v)=0$ for all $v \in V$, then $T=0$.
Nov
14
asked When can $\sup_x$ and $\sup_y$ be swapped?
Nov
14
answered Is it true that $ \sup_x (f(x) - g(x)) \geq \sup_x f(x) - \sup_x g(x)? $
Nov
14
asked Is it true that $ \sup_x (f(x) - g(x)) \geq \sup_x f(x) - \sup_x g(x)? $
Nov
10
asked When can we take $A$ somehow out of $\langle x,Ay\rangle$?
Nov
5
asked Can Cauchy Schwarz inequality be proven using Jensen's inequality?
Nov
5
asked Writing clear proofs involving multiple theorems and conditions
Nov
5
asked If $X < a$, $EX < a$?
Nov
4
asked Independence and uncorrelatedness between two normal random vectors.
Nov
4
asked Are two random vectors independent, iff every pair of components from each vector are independent?
Nov
4
asked Does a Pareto distribution always have variance?
Nov
3
answered For $E (X - EX)^2$ to exist, do we need $EX$ to exist and be finite?
Nov
3
asked For $E (X - EX)^2$ to exist, do we need $EX$ to exist and be finite?
Nov
3
asked Does $EX$ need to be finite for $E (X - EX)^n$ to exist?
Nov
3
asked If $\mathrm{E} |X|^2$ exists, then $\mathrm{E} X$ also exists
Nov
3
asked Does $\mathrm{E} |X|$ finite imply $\mathrm{E} |X|^2$ finite?
Nov
3
asked $l^p$ norm on an inner product space
Oct
31
asked Probability distribution on a functional space invariant to any permutation of the domain
Oct
22
asked matrix representation of the basis transform by Gram-schmidt orthogonalization
Oct
21
asked Coordinates of a vector under a basis in a Hilbert space?