New posts in Elementary Proofs

Sum of squared nearest-neighbor distances between points in a square

How often does the Mertens function vanish?

Different derivations of the value of $\prod_{0\leq j<k<n}(\eta^k-\eta^j)$

Certain matrices of interesting determinant

A Putnam problem with a twist

A link between hooks and contents: Part II

A link between hooks, contents and parts of a partition

Why are the medians of a triangle concurrent? In absolute geometry

Primality test for specific class of Proth numbers

Solution to a Diophantine equation