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 $\mathrm{Tree}^6$.
The argument …
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. – p. 262
This is a good point and a nice way of …
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 …
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. After a short …
Jan 21, 2013
If I say the word “swimming” to you, you’ve got a fair bit of information about what word I’m going to say next. Most likely I’ll say “pool”, but I might say …