Mr. Wilkinson is the author of “A Divine Language: Learning Algebra, Geometry, and Calculus at the Edge of Old Age.” As a boy in the first weeks of algebra class, I felt confused and then I went sort ...

For more than a century, Srinivasa Ramanujan’s uncanny formulas for the number pi have looked like pure mathematical fireworks, dazzling but detached from the physical world. Now a new wave of ...

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Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...

This is episode two of a three-part series. You can listen to part one here and part three here. [CLIP: Theme music] Rachel Feltman: Ever wondered what math actually is? No? Well, mathematicians sure ...