- Differential geometry, global space-time geometry in particular
- Co-author of one of the standard research monographs in this area( Global Lorentzian Geometry, Second Revised Edition, Marcel Dekker, Pure and Applied Mathematics, Vol. 202, 1996)
An Essay on the Historical Development of Continuity (after David Bressoud)
How Did Pierre de Fermat Work Max-Min Problems Himself ?
MATHEMATICS IN E-COMMERCE : Amazon.com Calls on Applied Optimization
List of Participants at the Session on Differential Geometry and General Relativity at WCNA 2008, Orlando, Florida, July 2008 (organizers Duggal, Ehrlich)
List of Participants at the Session on Geometric Methods in Mathematical Physics at WCNA 2004, Orlando, Florida, July 2004. (organizers Duggal, Ehrlich)
List of Participants at the Session in Differential Geometry, General Relativity, and Differential Equations, at WCNA - 2000, University of Catania, Sicily, July, 2000. (organizers Beem, Ehrlich)
Global Lorentzian Geometry, second edition
For a History of the Early University of Florida and Mathematics Department, by Paul Ehrlich and Nancy Moore
For the schedule of the Geometry/Mathematical Physics Seminar
For a listing of the publications of Professor Ehrlich
Sir Isaac Newton makes the Investor's Business DailySir Issac Newton participated in the investment mania now known by historians as the South Sea Bubble, during 1720. On January 1, 1720, one share of South Sea Company stock was worth 128 pounds, on June 24, 1720, it traded for 1,050 pounds, and was shortly thereafter worthless. Newton is quoted as saying on the problem of knowing when to sell, "I can calculate the motions of heavenly bodies, but not the madness of people."In a much later response to this quotation, the legendary 20th century investor Warren Buffet writing in the Berkshire Hathaway annual report during 2006 wrote that Newton should perhaps have formulated a Fourth Law -- "For investors as a whole, returns decrease as motion (e.g., trading frequency) increases."
Teaching Assignment for Spring 2011
Teaching Assignment for Spring 2010
- MAC 2313, Section 4576, Analytic Geometry & Calculus III, 8th Period, Little 201
- MAC2313, Section 3122, Analytic Geometry & Calculus III, 6th Period, Little 221
Fall 2005 -- on Research LeaveI spent much of October at the Isaac Newton Institute for Mathematical Sciences in Cambridge, England, participating in an international scientific research programme held throughout fall, 2005 on "Global Problems in Mathematical Relativity."