## Prismatic Cohomology

##### 21 March 2019

When I was working in Los Angeles last year, my main focus was thinking about motivic cohomology with Michael Rios. Other quantum gravity colleagues were less mathematically inclined, and only Michael and I appreciated the depth of the new theory and its potential for deriving classical spaces. Mike likes to wear Pink Floyd T-shirts with prisms on them, and he put the picture on an arxiv paper some time ago.

This week at UCLA (oh, Los Angeles) a mathematician is talking about a new theory of motivic cohomology, which is called Prismatic Cohomology, after the Pink Floyd album cover (for the Dark Side of the Moon).

Terence Tao links to new seminar notes by anonymous audience members. Take a look.

As you know, q-deformations are what happens to classical algebras when we go to braided structures. And from quantum gravity, we determined that the cohomology underlies the emergence of coordinates.