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Jonathan Lubin
I’ve been retired* from Brown for over a dozen years now, or emeritus if you like Latin†. Left Providence somewhat dubiously in 1998, and then discovered that Pasadena had certain charms of its own. Now (March 2013), we’re settled in Saint Paul, but still feeling our way around.
* Not retiring enough, according to some.
† It really means “depleted of merit”.
e-mail: 
Phone number at Brown: 401-863-7955, but that’s good only when I’m in
my shared office; most of the time when I’m at Brown,
you’ll have to call
401-863-2708. And that’s also the number to call if you want my home
address or number. The mailing address at Brown is:
c/o Brown Mathematics Department, Box 1917
Providence RI 02912-1917, USA
At any rate, in this site you’ll find everything about my professional life: here, you can get my Curriculum Vitæ in .pdf format, as well as a list of my publications. And you see my contact information to the left. For all other (nonmathematical) information about me, you should look in on my other page.
Formally, I’m still a member of the Number Theory Group at Brown, but since I’m there so little, my mathematical contacts have up to now been more at Caltech, USC, and even UCLA. Here in Saint Paul, I suppose I should be feeling bad at not having stopped in at UM, a couple of miles from here, but I’ve been rather busy with domesticities.
As for research, I actually am continuing to get a little done. That means Algebraic Geometry and Number Theory broadly; narrowly, it means p-adic analysis, nonarchimedean dynamical systems, and formal groups. Most recently, I have a paper in the Journal of Number Theory, in the special issue in memory of David Hayes. In it, I use the elementariest analytic methods to reprove several standard but rather deep results of Higher Ramification Theory, in particular the Hasse-Arf Theorem. If you’d like a .pdf of it, just let me know.