CHRIS RORRES
Professor Emeritus of Mathematics
Drexel University
Philadelphia, Pennsylvania, USA
Email: crorres@cs.drexel.edu
Lecturer in Epidemiology
University of Pennsylvania
Philadelphia, Pennsylvania, USA
Email: rorres@vet.upenn.edu
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CHRIS RORRES Professor Emeritus of Mathematics Drexel University Philadelphia, Pennsylvania, USA Email: crorres@cs.drexel.edu
Lecturer in Epidemiology |
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ARCHIMEDES
HOME
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This site is a collection of Archimedean miscellanea that I have collected over the years. The topics, under continual development, include:
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R E P R I N T
[PDF version (664 kilobytes)]
The Mathematical Intelligencer
COMPLETING
BOOK
II OF
ARCHIMEDES’S
by Chris Rorres
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Two overviews of this article can be found in Ivars Peterson’s online columns in Science News Online (MATHTREK: 21 August 2004) and Science News for Kids (MUSE: January 2005).
Two more overviews, by science writer Dana Mackenzie, can be found in Science magazine (“Whatever floats your paraboloid”, Volume 305, Number 5687, 20 August 2004, page 1102) and in Discover magazine (“Tilt”, Volume 26, Number 07, July 2005, pages 36-37).
Another overview as it applies to the stability of kayaks was printed in Mountain Gazette magazine (“The occupation of floating bodies” by B. Frank, Number 123, April 2006).
[Remark: The animated figure illustrates the seven equilibrium positions (both stable and unstable) of a floating paraboloid whose height is 0.88 times its diameter and whose relative density is 0.51. The seven tilt angles are 0°(base up), 32.4°, 61.4°, 95.8°, 118.7°, 140.8°, and 180°(base down).]
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R E P R I N T
[PDF version (1003 kilobytes)]
ASCE Journal of Hydraulic Engineering
THE
TURN OF THE
SCREW:
by Chris Rorres
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R E P R I N T
[WWW version
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PDF version (586 kilobytes)]
SIAM Review
FINDING THE
CENTER OF A
by Chris Rorres and David Gilman Romano
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(Photo from the cover of Athletics and Mathematics in Archaic Corinth: The Origins of the Greek Stadion, by David Gilman Romano. Memoirs of the American Philosophical Society, Volume 206, American Philosophical Society, Philadelphia, 1993.)
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ELEMENTARY LINEAR ALGEBRA
by Howard Anton and Chris Rorres
864 pages |
A P P L I C A T I O N S V E R S I O N
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An interview with me in February 2008 about this textbook can be found on the Portuguese blog O Universitário de Física.
Panayiotitsa Rorres |
You can download a QuickTime movie of a morph constructed from four photographs of a woman taken over a 56-year period.
30 seconds (4 frames/second) 240 x 320 pixels |
Panayiotitsa Rorres |
Class picture taken April 17, 2001
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Course taught in the Spring quarter of 2000-01:
ADVANCED ORDINARY DIFFERENTIAL EQUATIONS III
MATH 680-502 | 3 credits | Tuesdays | 6-9 pm The third course of a three-term graduate sequence. |
The class picture painted on |
