May 3, 2020
A platform for hamburgers. Think GrubHub. In this note, we’ll try to understand what is a platform, and whether they can be improved with a “coop” structure.…
May 25, 2016
There’s a famous dubious argument that “proves” the set of $\mathrm{Tree}$ of (planar, rooted) binary trees is in bijection with the set of $7$-tuples of trees $\mathrm{Tree}^6$.…
Jan 18, 2016
The ideas, knowledge, beliefs, laws and regulations, etc. contained in a culture would be the genetic instructions ordering the use of exosomatic energy.…
Jan 18, 2016
I’ve often heard people say that the interesting part of number theory is the interaction between addition and multiplication, but I only yesterday realized one reason why that is, triggered by convincing myself that $a b = \mathrm{lcm}(a,b)\mathrm{gcd}(a,b)$ (a train of thought triggered by seeing the letters “GCD” graffitied on a wall in Chicago).…
Jul 9, 2014
The other day I was sitting in The Coop in Cambridge, reading a book on combinatorial games, and so naturally I started wondering about games played in groups, or on their Cayley graphs at least.…