Jonathan A Poritz Primary Position & Teaching Information: • I'm Associate Professor [on leave Fall 2017 to Spring 2018] in the Department of Mathematics and Physics and Data Analyst in the Center for Teaching and Learning, both at Colorado State University – Pueblo, in Pueblo, Colorado, USA. • Web pages for many past courses I have taught are here. • Contact info. Some Personal Information: • If you need to recognize me in person, see one image, or another, or another. • E-mail: jonathan@poritz.net (That is my primary, preferred e-mail address. You can also try jonathan.poritz@csupueblo.edu, poritzj@post.harvard.edu, or jonathan.poritz@gmail.com if you like) An old public key of mine (fingerprint 7C8B ADBA FE03 3C31 4E52 071D 8488 65F3 7638 565E) was compromised: please no longer use it. I do speak crypto, so if you want to send me encrypted mail, I can set it up. • Here is an up-to-date CV. • Here are some prior affiliations. Some Scientific Information: • Here is material I'm putting out in the world: articles, books, patents, talks, etc. • E.g., there's a fairly new book! Click the cover for more info ⇝ • E.g., there's a fairly new book! Click the cover for more info: • Click here for some interactive mathematics: an applet to visualize the geometry of fundamental domains for the action of cyclic subgroups of $PSL(2,\CC)$ on $\partial H^3_\RR$. Some fundamental domains in the interior of $H^3_\RR$ for this action are in a gallery.

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!