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Sep
15
comment How to solve integrals of the form $\int u^{-\alpha} e^{-\beta u} du$?
@ClaudeLeibovici: Can you give me the defn. of $E_{-\alpha}$? Is it the exponential integral?
Sep
15
revised How to solve integrals of the form $\int u^{-\alpha} e^{-\beta u} du$?
added 47 characters in body; edited title
Sep
15
asked How to solve integrals of the form $\int u^{-\alpha} e^{-\beta u} du$?
Sep
11
asked Is there a closed form solution for this differential equation?
Jul
2
awarded  Curious
Jun
15
accepted Calculating expectation conditioned on a sigma algebra
May
5
awarded  Excavator
May
4
revised Example where union of increasing sigma algebras is not a sigma algebra
made title precise.
May
4
comment Example where union of increasing sigma algebras is not a sigma algebra
Related: math.stackexchange.com/questions/26888/…
May
4
suggested approved edit on Example where union of increasing sigma algebras is not a sigma algebra
May
3
accepted Expressing power set of rationals
May
3
asked Expressing power set of rationals
May
1
comment Calculating expectation conditioned on a sigma algebra
Thanks Did. While I understand this, my thinking gets muddled when it comes to looking at sets and sigma algebras. Could you please help me out?
May
1
comment Calculating expectation conditioned on a sigma algebra
Hmmm, so is it $\sigma(Y)=\sigma(\{\phi,\Omega,\mathcal{B}{\{\omega\ge k\}},\mathcal{B}{\{\omega\le k\}}\})$? I am confused here...
May
1
comment Calculating expectation conditioned on a sigma algebra
@Did: I see. These are the atoms of $\sigma(Y)$, so the actual sigma algebra is the smallest sigma algebra generated from these atoms. Is that correct?
Apr
30
asked Calculating expectation conditioned on a sigma algebra
Apr
3
awarded  Popular Question
Feb
12
awarded  Popular Question
Feb
6
awarded  Yearling
Jan
15
asked Non-zero solutions to $B(p+p^2+p^3+\ldots)=Ap$