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 Apr8 awarded Notable Question Sep13 awarded Popular Question Jun9 revised a question on general conditional probability added 84 characters in body Jun9 asked a question on general conditional probability Jun9 revised expectation of product of independent random variable edited title Jun9 asked expectation of product of independent random variable Jun9 accepted probability question on characteristic function Jun9 asked How to use joint characteristic function to calculate characteristic function for single variables? Jun9 revised probability question on characteristic function added 3 characters in body Jun9 asked probability question on characteristic function May30 accepted existence of Lebesgue integral May30 accepted Example that the Lebesgue integral of a function can take any value between $[0,c]$ May30 accepted Prove that $f_n$ converges to $f$ in $L_1$ norm given $\int f_n \to \int f$ May30 revised How to find irreducible polynomials over $\mathbb{Q}(i)$ with prescribed Galois group? added 273 characters in body May30 comment How to find irreducible polynomials over $\mathbb{Q}(i)$ with prescribed Galois group? @Lubin : I found I made mistakes in looking for polynomial in Q[x] whose galois group isormorphic to C2xc2 , C5 . For isomorphic to C2xC2, the only polynomial I can think of is of(X^2 - D1)(x^2 -D2) form , where D1 , D2 are not square in Q . However , this should be reducible in Q .. For C5 , the polynomial I found is reducible too.. Some of my classmates think there is no such irreducible polynomial over Q in C2xC2 and C5 case .. Is that correct ? I am wondering if there is some systematic way to find these polynomials . May29 asked How to find irreducible polynomials over $\mathbb{Q}(i)$ with prescribed Galois group? May29 asked An elementary graph theory problem May26 comment existence of Lebesgue integral i havent learnt laytex... Can any one help me to edit it ? May26 asked existence of Lebesgue integral May25 revised Prove that $f_n$ converges to $f$ in $L_1$ norm given $\int f_n \to \int f$ added 50 characters in body; edited tags