Matthew Conroy
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 14h revised Proving $T(n) = 1 + \sum_{j=0}^{n-1} T(j)$, $T(0)=1$ implies $T(n)=2^n$ better title 20h revised proof that $\frac{e^{-t}}{2}(t^2+2t+2)\le1$ for $t\ge0$ better title Apr20 revised Value of the 3 prime numbers retagged Apr20 revised A policeman is 834 feet behind a car travling 25 mph arithmetic, not linear algebra Apr17 comment Multiples of some set has density An early mention: Erdos, On the Density of Some Sequences of Integers, Bull. Amer. Math. Soc. Volume 54, Number 8 (1948), 685-692: "It is very easy to see that if $\sum \frac{1}{a_i}$ converges, then the sequence of $b$'s [the elements of the set of multiples of the set of $a$'s] has possesses a density." He does not prove this, but instead proves that a certain weaker condition is sufficient. Apr17 comment Multiples of some set has density You mean $M(S)$ (or some other similar notation) rather than $S$ in your limit expression, right? What you have it the density of $S$, not the set of multiples of $S$. Unless I'm confused. Apr17 answered Why does the graph of $y=\gcd \left(\frac{x}{y},xy\right)$ seem to have 4 “straight” lines? Apr15 comment Sums of triangles What is "the triangle of a number"? Apr13 revised Probability of circle inside square title spelling Apr3 revised Handshake problem when no. of handshakes are given no reason to put SOLVED in the title Apr3 revised Proving $2^{2^n}+3^{2^n}+5^{2^n}$ is divisible by $19$ for all $n\geq 1$ by induction removed extraneous period Apr1 revised Calculate new least common denominator removed unrelated tags Apr1 reviewed Approve Numerical Approximation for 2D Curvature Mar30 revised solutions to $x^2 \equiv a \mod p^\lambda$ with $a = p^\alpha k$, $\lambda>\alpha$ more informative title Mar18 revised Probability of at most two aces better typesetting, wording, corrected typos Mar11 revised need help with a proof, Eulers theorem closing parenthesis added Mar9 revised Toss a fair die until the cumulative sum is a perfect square-Expected Value added dice tag Mar6 revised Euclid proof of infinite primes. link fix Mar6 revised writing $pq$ as a sum of squares for primes $p,q$ better title Mar6 revised $n^2(n^2-1)(n^2-4)$ is always divisible by 360 $(n>2,n\in \mathbb{N})$ better title, tex