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seen Dec 16 at 6:38

Dec
15
accepted How can I recursively approximate a moving average and standard deviation?
Mar
13
accepted Can a set containing a single vector from a vector space over a finite field be linearly dependent?
Jan
18
accepted Is the construction of $\mathbb{R}$ by Cauchy sequences due to Cauchy? For that matter, are Cauchy sequences due to Cauchy?
Dec
16
accepted Prove that if $n\geq\text{lcm}(a,b)$ and $\gcd(a,b)|n$ then $n=xa+yb$ for some integers $x,y\geq 0$
Dec
16
accepted 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
16
accepted Prove for a connected graph $G=(V,E)$, $\kappa(G)=1+\min_{v\in V}\kappa(G-v)$
Dec
14
accepted Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
Nov
6
accepted 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
18
accepted Prove that flow is a linear combination of flow cycles and flow paths
Oct
17
accepted I have a recursively defined function, and another function involving powers of a matrix. How can I show that they are equal?
Oct
5
accepted Help with a step in Diestel's proof of Tutte's theorem in Graph Theory
Sep
29
accepted If $X\sim \exp(\lambda)$ and $Y\sim \exp(\mu)$ then $P(X\leq Y)=\frac{\lambda}{\lambda+\mu}$. Is there an intuitive interpretation for this fact?
Aug
2
accepted Does the probability distribution associated with this pdf have a name?
Jul
29
accepted How is this step in the proof that $E[X]=\sum_{x=1}^\infty P(X\geq x)$ justified?
Jul
19
accepted Prove that if $p_1,\dots,p_k$ are distinct odd primes then 1 has $2^k$ square roots $\mod m$ where $m$ is the product of the primes.
Jul
19
accepted If $x\equiv y \pmod{\gcd(a,b)}$, show that there is a unique $z\pmod{\text{lcm}(a,b)}$ with $z\equiv x\pmod a$ and $z\equiv y\pmod b$
Jul
4
accepted A die is rolled until a 6 comes up. Should the sample space of this experiment contain the set of all infinite sequences which do not contain a 6?
Jul
4
accepted The principle of duality for sets
Jun
28
accepted Is every day tau day (or pi day) to some base?
Jun
20
accepted Find the Dirichlet inverse of the identity function