Mathematicians used “magic functions” to prove that two highly symmetric lattices solve a myriad of problems in eight- and 24-dimensional space. The points could be an infinite collection of electrons ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

He was supposed to be working on long-form multiplication problems—457 x 214, 378 x 29, 112 x 978—and my son kept asking me to check his answers. But it had been so long since I’d written out any math ...