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 Apr 11 awarded Nice Question Jul 12 awarded Quorum Oct 19 awarded Scholar Oct 19 accepted Unique representation of reals by (infinite) application of the (+,-,/,*,^) operations to elements of $\mathbb Q$? Oct 19 asked Unique representation of reals by (infinite) application of the (+,-,/,*,^) operations to elements of $\mathbb Q$? Oct 6 asked For $X \sim \mathrm{Binomial}(n,\frac{1}{2})$ does there exist $a,b,c,Y$ s.t. $\Pr[X=x]\Pr[X \le x] \leq a\Pr[Y=bx+c]$? Oct 4 revised Number of Unimodular Sequnces added 4 characters in body Oct 4 awarded Teacher Oct 4 answered products of logarithms Oct 4 answered Number of Unimodular Sequnces Oct 4 revised Calculating $\sum_{y=0}^x \Pr[Y= y] \Pr[Z\leq k-y]^2$ when Y,Z are binomially distributed? added 20 characters in body Oct 4 revised Calculating $\sum_{y=0}^x \Pr[Y= y] \Pr[Z\leq k-y]^2$ when Y,Z are binomially distributed? deleted 2 characters in body Oct 4 awarded Editor Oct 4 revised Calculating $\sum_{y=0}^x \Pr[Y= y] \Pr[Z\leq k-y]^2$ when Y,Z are binomially distributed? added 1215 characters in body; edited title Oct 2 awarded Tumbleweed Sep 25 asked Calculating $\sum_{y=0}^x \Pr[Y= y] \Pr[Z\leq k-y]^2$ when Y,Z are binomially distributed? Jan 14 comment Interpretation of boundary homomorphism in long exact sequence of homology groups Can you verify or correct the following reasoning? I don't think it is very nice working with the "same" element in different groups, without giving it different names.. But: $\alpha \in C_n(X,A)$ can be considered as an element $\alpha' \in C_n(X)$, for which it holds that $j(\alpha')=\alpha$. Using the boundary map on chain level, we get $\partial \alpha'$, which is uniquely determined as an element of $C_{n-1}(A)$, since $i$ is an isomorphism by exactness. Since essentially $\alpha'=\alpha$, the desired result holds. Jan 14 awarded Student Jan 14 asked Interpretation of boundary homomorphism in long exact sequence of homology groups