JOHN A. VELLING
Professor of Mathematics
Contact information:
Office: Room 1119d, Old Ingersoll
Hall
Phone: 7189515600 (x 5248)
Email: jvelling@brooklyn.cuny.edu
Website: http://userhome.brooklyn.cuny.edu/jvelling/BCjob/
At the CUNY Graduate Center (365 Fifth Avenue), my office is
room 4307.
The telephone number is 2128178553 or 8554.
Office Hours (Spring 2016):
Room 0105 
Ingersoll Hall  M  W, 1:00pm  2:00pm
Current courses:
SECTION 
ROOM 
DAYS/ HOURS 
Math 2501

IH 0105

M  W, 11:00am  12:15pm

Math 1201

IH 0105

M  W, 3:40pm  5:20pm 
Math 1206

IH 0105

M  W, 6:05pm  7:45pm

Research interests:
My research interests have been focused on geometric
function theory and its various components: complex
analysis, differential geometry, ergodic theory and
dynamical systems.
Selected Publications:
 Mapping the disk to convex subregions
 Existence and uniqueness of complete constant mean
curvature surfaces at infinity of H
 Harmonic Measure, Infinite Kernels, and Symmetrization
 Conformal irregularity for Denjoy diffeomorphisms of
the 2torus
 Notes on projective structures and Kleinian groups
 Degeneration of quasicircles: inner and outer radii of
Teichm\"uller spaces
 A sufficient condition for Teichm\"{u}ller spaces to
have smallest possible inner radii
 On inner radii of Teichm\"{u}ller spaces
 The action at infinity of conservative groups of
hyperbolic motions need not have atoms
 The uniformization of rectangles, an exercise in
Schwarz's lemma
 Recurrent Fuchsian groups whose Riemann surfaces have
infinite dimensional spaces of bounded harmonic
functions

