New posts in Alternative Proof

Proving $|a+b|\le |a|+|b|$ from $-|a|\le a \le |a|$

Some Combinatorics and Some Prime Numbers

How to prove this algebraic version of the sine law?

Why is this arbitrary-looking identity of arithmetic functions "obvious"?

Minimize $|a-1|^3+|b-1|^3$ with constant product $ab=s$

Proving a complicated looking inequality in a simple way

Symmetric rational function is a rational function in the elementary symmetric polynomials.

Questionable Proof in Visual Complex Analysis

Distances from Morley triangle to edges of the original triangle

Prove that $A^2=a_1^2+a_2^2-a_3^2-a_4^2$ for all integers $A$.