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 Dec 16 answered variance and generating function - probability hat problem Dec 15 answered Basic Math Question for Test Dec 14 answered Addition of probabilities and gambler's fallacy Dec 14 answered Fibonacci proof question: $f_{n+1}f_{n-1}-f_n^2=(-1)^n$ Dec 14 answered Why is it that $E(xy) = E(x)E(y)$ if $x$ and $y$ are uncorrelated random variables? Dec 14 asked Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles Dec 11 answered Finding number of paths between vertices in a graph Dec 10 answered existing of limiting point and delta exist Dec 10 answered How to calculate the a Probability with Z-Score. Dec 8 answered Prove that $S = \left \{(x, y) \in \mathbb{N} \times \mathbb{R}: xy = 1 \right\}$ is denumerable Dec 8 answered de morgan law $A\setminus (B \cap C) = (A\setminus B) \cup (A\setminus C)$ Dec 5 asked Let $T$ be a spanning tree. Prove that for cycles $C,D$, $E(C)\backslash E(T) = E(D)\backslash E(T)\implies C=D$ Dec 5 answered Is there a proof for Archimedes' pictorial proof for the approximation of pi? Dec 4 answered Prove that a circle has an infinite number of tangents Nov 29 asked $f$-factors and fractional $f$-factors and odd cycles Nov 6 asked Prove that the number of pairs of edges that cross in a drawing of $K_n$ is at least $\frac{1}{5}\binom{n}{4}$ (for $n\geq 5$) Oct 23 answered Proof by Induction for a recursive sequence and a formula Oct 20 answered What is that sign in the context of vectors? Oct 18 asked Prove for a connected graph $G=(V,E)$, $\kappa(G)=1+\min_{v\in V}\kappa(G-v)$ Oct 17 answered Covering a chess board with $2$ missing places with $31$ dominoes