Joe Li
Reputation
Top tag
Next privilege 100 Rep.
Edit community wikis
 Mar 3 accepted What's wrong with this integral? Mar 1 comment What's wrong with this integral? Thank you guys. You're all right. I mistakenly thought $du=2dx$. That what happen after not having really calculated an integration after 10 year. Mar 1 asked What's wrong with this integral? Jan 30 comment Does $f:\mathbb{R}^d\to \mathbb{C}$ implies $|f|<\infty$ almost everywhere? @REr Forget about $1/x$. That's something I come up with. I've update the post and include the text I'm confused about. Jan 30 revised Does $f:\mathbb{R}^d\to \mathbb{C}$ implies $|f|<\infty$ almost everywhere? added 356 characters in body Jan 30 comment Does $f:\mathbb{R}^d\to \mathbb{C}$ implies $|f|<\infty$ almost everywhere? @berni-waterman I don't think anything is assumed for $f$. I'm just asking the terms and notation. Jan 30 revised Does $f:\mathbb{R}^d\to \mathbb{C}$ implies $|f|<\infty$ almost everywhere? edited tags Jan 30 asked Does $f:\mathbb{R}^d\to \mathbb{C}$ implies $|f|<\infty$ almost everywhere? Nov 18 comment $Y(t)=W^2(t)\cdot e^{aW(t)}$, find $dY$ Thank you. I forgot that I can use Ito's lemma directly to check that. Nov 18 accepted $Y(t)=W^2(t)\cdot e^{aW(t)}$, find $dY$ Nov 18 asked $Y(t)=W^2(t)\cdot e^{aW(t)}$, find $dY$ Feb 24 awarded Curious Feb 23 comment Why $\|f-g\|=0$ if and only if $f=g$? Thanks @Winther. But by saying almost everywhere, do we need specify the measure before the definition of this norm? Feb 23 revised Why $\|f-g\|=0$ if and only if $f=g$? added 89 characters in body Feb 23 asked Why $\|f-g\|=0$ if and only if $f=g$? Feb 21 accepted Is the integral finite if the integrand is $o(x^{-1})$? Feb 21 comment Is the integral finite if the integrand is $o(x^{-1})$? Thank you @MarioCarneiro! I think the intuition is that there exist a large class of functions that converge to 0 faster than $x^{-1}$ but slower than $x^{-\alpha}$ for any $\alpha < -1$. I think I saw somewhere there's no boundary between convergence and divergence. Feb 21 asked Is the integral finite if the integrand is $o(x^{-1})$? Apr 30 asked Need an operator on sets similar to Cartesian product Apr 18 awarded Scholar