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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.


1d
awarded  Nice Question
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
15
revised 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? $
deleted 13 characters in body
Dec
15
asked 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
13
asked Meaning of “within a constant factor from”?
Dec
10
awarded  Caucus
Dec
10
awarded  Nice Question
Dec
6
accepted Application of Jensen's inequality
Dec
5
comment Application of Jensen's inequality
Thanks. How do you prove my second inequality? @Timbuc?
Dec
5
comment Condition on $f$ for $f(x+y) \leq f(x) + f(y)$?
That's right. I am looking for some inequalities that say some functions are subaddtive or superadditive.
Dec
5
asked Condition on $f$ for $f(x+y) \leq f(x) + f(y)$?
Dec
5
comment Application of Jensen's inequality
@DanielFischer: That's right. The measure should be a probability measure.
Dec
5
awarded  Notable Question
Dec
5
comment Application of Jensen's inequality
So are the two inequalities in my question not because of Jensen's ineq? Are they correct then?
Dec
5
comment Application of Jensen's inequality
convex as in Jensen's inequality en.wikipedia.org/wiki/Jensen%27s_inequality#Statements
Dec
5
asked Application of Jensen's inequality
Dec
4
awarded  Popular Question
Dec
1
comment Relative complement and subtraction.
What is $e_v$?.
Dec
1
comment Relative complement and subtraction.
Thanks.How similar is orthogonal complement $W_2^\perp$ to the complement $B^c$? Therefore how similar is the relative complement to the set difference?
Dec
1
asked Relative complement and subtraction.