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Dec
8
answered de morgan law $A\setminus (B \cap C) = (A\setminus B) \cup (A\setminus C) $
Dec
6
comment Exponential Growth
You've almost certainly been given a formula for this type of growth. From that formula, can you figure out what an expression would for the population to be at some level $P$, and twice that rate $2P$?
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
revised Is there a proof for Archimedes' pictorial proof for the approximation of pi?
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Dec
5
revised Is there a proof for Archimedes' pictorial proof for the approximation of pi?
deleted 3 characters in body
Dec
5
comment Is there a proof for Archimedes' pictorial proof for the approximation of pi?
@user7530 It's not a formula for approximating $\pi$; it's a proof that the procedure for approximating $\pi$ really works.
Dec
5
answered Is there a proof for Archimedes' pictorial proof for the approximation of pi?
Dec
4
revised $f$-factors and fractional $f$-factors and odd cycles
added 268 characters in body
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
27
awarded  Popular Question
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 $n\geq 5$)
Nov
6
comment 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 $n\geq 5$)
@JaycobColeman good point, done.
Nov
6
revised 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 $n\geq 5$)
added 54 characters in body
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
accepted Prove that flow is a linear combination of flow cycles and flow paths
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