Jonathan A Poritz

Decomposition of the trace plane by type of corresponding Ford domain; see paper with T. Drumm

Subsets of the 4-dimensional Birkhoff polytope used in a finite product decomposition of the set of entropy-preserving stochastic average; see paper with A. Poritz

A fundamental domain with many faces, seen from outside hyperbolic space; see paper with T. Drumm

A few interesting fundamental domains of cyclic groups of isometries of hyperbolic space; see paper with T. Drumm

What I do:

Two roles at Colorado State University Pueblo, in Pueblo, Colorado, USA:
- OER Coordinator, attached to the CSU-Pueblo Library
- Associate Professor in the Department of Mathematics and Physics
Another role, through the Colorado Department of Higher Education:
- member of the Colorado OER Council [having been chair in 2018-19]
Blogging as μαθηματικoς (at mathematikoi.net) and tweeting as @poritzj.
I use pronouns he/him.

What I've done:

Lots of teaching info in these web pages for many past courses I have taught.
Always SHARE: here is material I'm putting out in the world, such as articles, books, slide decks (and sometimes video or audio) from talks, etc. — I think of this as my own little contribution to the global intellectual commons.
Great detail is in my up-to-date CV.
A mathematical project I did long ago resulted in a gallery of some fundamental domains in the interior of $H^3_\RR$ for the action of cyclic subgroups of $PSL(2,\CC)$.
Some of my activities are memorialized on this page with certificates and "badges".

Where I am:

Here is my physical space contact information. [And if you need to recognize me in person, see this serious, professional image of me or else a more fun image of me with flowers in my hair.]
E-mail:
► "Jonathan A Poritz" <jonathan.poritz@gmail.com> where I can read email encrypted with my public key [PGP fingerprint: F52E 686D 54BC 1F80 27E1 2605 3220 26C4 B74F 20AA]
► jonathan@poritz.net or poritzj@post.harvard.edu are possible alternatives; attachments encrypted with the above public key are fine, obvs.

An explanation of the background is available for the incurably curious; other pictures on this page are fully explained in my papers -- read them or weep!

An explanation of the background is available for the incurably curious.

The same fundamental domains as at the top, viewed from outside hyperbolic space; see paper with T. Drumm

Birkhoff's polytope in four dimensions; see paper with A. Poritz

A type {2,7,5} example on the boundary of hyperbolic space; see paper with T. Drumm

The 3-dimensional moduli space of boundary compactifications; see papers with A. Iozzi