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 Yearling
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2d
comment Seeking a More Elegant Proof to an Expectation Inequality
Very nice! Thank you very much!
May
22
asked $\sum_{i=1}^n\sum_{j=1}^n|c_i+c_j|a_ia_j\geq\sum_{i=1}^n\sum_{j=1}^n|c_i-c_j|a_ia_j$
May
18
revised The name of invariance principle of Donsker
edited tags
May
18
asked The name of invariance principle of Donsker
May
18
accepted Dose weak convergence imply tight?
May
18
comment Dose weak convergence imply tight?
Thank you very much!
May
17
comment An expectation inequality
Could you please write the details?
May
17
comment Dose weak convergence imply tight?
@PhoemueX Do you mean separable metric space is $\sigma$-compact?
May
17
comment An expectation inequality
I think $F$ need to be absolutely continuous, then $F$ can have derivative a.s..
May
16
comment Dose weak convergence imply tight?
@saz I don't know
May
16
awarded  Yearling
May
16
asked An expectation inequality
May
16
asked Dose weak convergence imply tight?
May
12
comment measurable process stopped at random time
$\big( X_T\in A , T < +\infty \big)=\big( X_T\in A \big)$, so there is no undefined question in this problem.
Sep
6
comment A problem about strong law of large numbers of Shiryaev's Probability
@DavideGiraudo I think you have followed mike's hint, am I right? If so, how to prove his hint 3? Thanks!
Aug
15
comment Prove this group $G$ is abelian
@MartinBrandenburg Thank you!
Aug
15
asked Prove this group $G$ is abelian
Aug
14
comment subgroups of finitely generated groups with a finite index
@mez It can be proved this $t$ is exactly $t_1=1$
Aug
12
comment Is group in which every $a$ satisfies $a^3=e$ abelian?
@ZhenLin Thank you!
Aug
12
asked Is group in which every $a$ satisfies $a^3=e$ abelian?