People / Evan Patterson

Principal Research Scientist

About

Evan Patterson is an applied mathematician, data scientist, and software engineer. He holds a PhD in Statistics from Stanford University and a BSc in Mathematics and Physics from Caltech. Evan aims to build next-generation tools for scientific and statistical modeling, structured by the concepts of category theory. In keeping with the spirit of the Topos Institute, he believes that science and technology form an integrated whole and should be employed to benefit, rather than to exploit, humanity.

Personal website

https://www.epatters.org/

GitHub

@epatters

Evan Patterson

Blog posts

Title	Date
How to prove equations using diagrams, Part 3	2026-10-14
Changing the frame: Formal modeling with LLM assistance, Part 1	2026-09-18
How to prove equations using diagrams, Part 2	2025-06-10
Growing the Topos tech team	2025-05-29
How to prove equations using diagrams, Part 1	2025-05-27
Graded categories as double functors	2025-05-01
Toward compact double categories: Part 2	2024-06-24
Toward compact double categories: Part 1	2024-06-20
Algebras are promonads	2024-01-29
Why double categories? Part 1	2024-01-15
Retrotransformations	2023-10-20
Cartesian double theories	2023-10-13
Unbiased monoidal categories are pseudo-elements	2023-08-15
Structured cospans as a cocartesian equipment	2023-03-15
Research opportunities at Topos in early 2023	2022-12-12
Decorated cospans via the Grothendieck construction	2022-05-30
Grothendieck construction for double categories	2022-05-23
Diagrammatic equations and multiphysics, Part 2	2022-04-15
Diagrammatic equations and multiphysics, Part 1	2022-04-08
Call for 2022 Summer Research Associates	2022-03-01
Topos seeks Research Software Engineer	2022-02-21