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Dec
16
answered variance and generating function - probability hat problem
Dec
16
accepted Prove for a connected graph $G=(V,E)$, $\kappa(G)=1+\min_{v\in V}\kappa(G-v)$
Dec
15
answered Basic Math Question for Test
Dec
15
comment Basic Math Question for Test
"How many terms do I need to remember?" - how many terms do you want to be able to answer? If 3/6 is a pass and you're just looking to pass, the answer will be different than if you want to know all 6.
Dec
14
revised Addition of probabilities and gambler's fallacy
added 34 characters in body
Dec
14
revised Fibonacci proof question
deleted 227 characters in body
Dec
14
answered Addition of probabilities and gambler's fallacy
Dec
14
answered Fibonacci proof question
Dec
14
answered Why is it that $E(xy) = E(x)E(y)$ if $x$ and $y$ are uncorrelated random variables?
Dec
14
revised Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
added 648 characters in body
Dec
14
comment Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
got it, thank you so much for reading my proof so carefully!
Dec
14
comment Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
hmm, I understand what you mean but is there something incorrect about my reasoning above? i.e. is it true that there must not be non-adjacent edges? It seems I've shown something slightly stronger which is that $O$ is a star. But is this incorrect?
Dec
14
accepted Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
Dec
14
comment Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
...seems obvious now. Dammit...
Dec
14
comment Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
@HenningMakholm that's what I thought at first too...
Dec
14
asked Necessary and sufficient condition so an edge-weighted complete graph has even weight on all cycles
Dec
11
comment solving system of 2 equations
You can add the two equations together to get rid of the $xy$ term.
Dec
11
answered Finding number of paths between vertices in a graph
Dec
11
comment Finding number of paths between vertices in a graph
Do you know how to multiply matrices together?
Dec
11
comment Confused with estimator for random variables.
One thing to notice is that $E[X]=k$