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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.


Dec
15
accepted If $|f_i(x_1) - f_i(x_2)| \leq a$ for all $f_i$'s, does $ | \min_i f_i(x_1) - \min_i f_i(x_2) | \leq a? $
Dec
6
accepted Application of Jensen's inequality
Nov
25
accepted When can $\sup_x$ and $\sup_y$ be swapped?
Nov
14
accepted Is it true that $ \sup_x (f(x) - g(x)) \geq \sup_x f(x) - \sup_x g(x)? $
Nov
5
accepted Are two random vectors independent, iff every pair of components from each vector are independent?
Nov
5
accepted Independence and uncorrelatedness between two normal random vectors.
Nov
4
accepted Does $\mathrm{E} |X|$ finite imply $\mathrm{E} |X|^2$ finite?
Nov
4
accepted If $\mathrm{E} |X|^2$ exists, then $\mathrm{E} X$ also exists
Nov
3
accepted $l^p$ norm on an inner product space
Oct
22
accepted Coordinates of a vector under a basis in a Hilbert space?
Jul
25
accepted Is this theorem about soundness or completeness?
Jul
23
accepted separating propositons with commas?
Jul
21
accepted Are variables logical or non-logical symbols in a logic system?
Jul
5
accepted Is the determinant of a matrix some kind of “integral” of the linear mapping?
Jul
5
accepted Matrices with the same characteristic polynomial
Jul
3
accepted Equivalent definitions for a coloop?
Jun
26
accepted Do the following properties characterize the set membership?
Jun
16
accepted Graphs that every two edges have a common vertex
May
27
accepted What is the name of $a \mapsto b$?
Mar
10
accepted The set of all random variables which generate the same $\sigma$-algebra