1 code implementation • 1 Nov 2022 • John C. Baez, Xiaoyan Li, Sophie Libkind, Nathaniel D. Osgood, Eric Redekopp
Stock and flow diagrams are already an important tool in epidemiology, but category theory lets us go further and treat these diagrams as mathematical entities in their own right.
no code implementations • 12 Jul 2021 • John C. Baez
Then $p = (p_1, \dots, p_n)$ is a time-dependent probability distribution, and we prove that its speed as measured by the Fisher information metric equals the variance in fitness.
no code implementations • 11 Jan 2021 • John C. Baez
These are the first 50 issues of This Week's Finds of Mathematical Physics, from January 19, 1993 to March 12, 1995.
History and Overview Mathematical Physics Mathematical Physics
no code implementations • 2 Mar 2009 • John C. Baez, Mike Stay
In physics, Feynman diagrams are used to reason about quantum processes.
Quantum Physics Category Theory