Celebrity colorists share their favorite copper hair hues. They say blondes have more fun and that brunettes do it better, ...

It’s no secret that as we age, our hair undergoes a series of unique changes. From graying strands to changes in texture, the ...

Red is the rarest hair color, but to understand why that’s the case, you need a basic grasp of the science. There’s a lot ...

Jacob Schwartz is a hair colorist and the hair color trend ambassador for Schwarzkopf. He's worked with a ton of big names, ...

Abstract: The classical Bernstein-Gel’fand-Gel’fand (BGG) correspondence exhibits a close relationship between the homological properties of a polynomial ring and an exterior algebra. More precisely, ...