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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
Apr
20
revised Value of the 3 prime numbers
retagged
Apr
20
revised A policeman is 834 feet behind a car travling 25 mph
arithmetic, not linear algebra
Apr
17
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.
Apr
17
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.
Apr
17
answered Why does the graph of $y=\gcd \left(\frac{x}{y},xy\right)$ seem to have 4 “straight” lines?
Apr
15
comment Sums of triangles
What is "the triangle of a number"?
Apr
13
revised Probability of circle inside square
title spelling
Apr
3
revised Handshake problem when no. of handshakes are given
no reason to put SOLVED in the title
Apr
3
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
Apr
1
revised Calculate new least common denominator
removed unrelated tags
Apr
1
reviewed Approve Numerical Approximation for 2D Curvature
Mar
30
revised solutions to $x^2 \equiv a \mod p^\lambda$ with $a = p^\alpha k$, $\lambda>\alpha$
more informative title
Mar
18
revised Probability of at most two aces
better typesetting, wording, corrected typos
Mar
11
revised need help with a proof, Eulers theorem
closing parenthesis added
Mar
9
revised Toss a fair die until the cumulative sum is a perfect square-Expected Value
added dice tag
Mar
6
revised Euclid proof of infinite primes.
link fix
Mar
6
revised writing $pq$ as a sum of squares for primes $p,q$
better title
Mar
6
revised $n^2(n^2-1)(n^2-4)$ is always divisible by 360 $(n>2,n\in \mathbb{N})$
better title, tex