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visits member for 4 years, 5 months
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30m
revised Number of Terms in a Polynomial (4th Degree)
edited tags
1d
revised Law of sines: uniform proof of Euclidean, spherical & hyperbolic cases
more descriptive title; wikipedia ref; minor edits
2d
revised Does $\frac{0}{0}$ really equal $1$?
edited tags
Dec
17
revised How do I prove that $x^2 ≡ 3 \mod4$ has no solutions?
edited tags
Dec
14
revised Fermat's Challenge
added 2 characters in body
Jul
24
revised The Name for $\mathbb{R}$, $\mathbb{C}$, $\mathbb{H}$ and $\mathbb{O}$ Exclusively Algebras?
edited tags
Jul
20
revised Is at least one of $6k + 1$ or $6k-1$ prime?
edited tags
Jul
18
revised Eilenberg-Maclane space $K(G\rtimes H, 1)$ for a semi-direct product.
edited tags
Jul
17
revised What does the colon use in the decimal place mean?
edited tags
Jul
15
revised How to find the length of diagonal of a rhombus
rolled back to a previous revision
Jul
14
revised if each each of two natural numbers a and b is a sum of two squares then ab is also a sum of two squares
more descriptive title
Jun
15
revised Gauss-type sums for cube roots
One concrete positive result added (+a typo fixed)
Jun
2
revised CHECK: Let p be a prime number. Show that $\binom{2p}{p}$ is congruent to $2$ mod $p$.
edited tags
May
26
revised Spin manifold and the second Stiefel-Whitney class
texified
May
23
revised Let $a,m,n \in \mathbf{N}$. Show that if $\gcd(m,n)=1$, then $\gcd(a,mn)=\gcd(a,m)\cdot\gcd(a,n)$.
edited tags
May
23
revised Find all integers $n$ (positive, negative, and zero) so that $n^2 + 1$ is divisible by $n + 1$.
edited tags
May
21
revised Direct proof that for a prime $p$ if $p\equiv 1 \bmod 4$ then $l(\sqrt{p})$ is odd.
edited tags
May
21
revised Open covers by simply connected sets and fundamental group
more descriptive title
May
20
revised Fibonacci combinatorial identity
edited tags
May
20
revised Finding integral solutions to the equation $x^4-ax^3-bx^2-cx-d=0$
edited title