Exposition

Integers, Of Other Kinds

On what makes the integers integers. Another (surprising) kind of integer. Why technical writing should feel like an adventure. Good writing is not planned. Expanding my algebraic intuition. Examples, examples, examples.

Tilings I

The joy of simple puzzles. Always think of the invariant. Curation is doing the Lord’s work. How to put a number to a geometric constraint? This thing called parity.