Columbia-Virginia Section Research Articles

“Shutting up like a telescope”: Lewis Carroll's “Curious” Condensation Method for Evaluating Determinants

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsAdrian RiceAdrian Rice (arice4@rmc.edu) received a B.Sc. in mathematics from University College London in 1992 and a Ph.D. in the history of mathematics from Middlesex University in 1997 for a dissertation on Augustus De Morgan. He is currently an associate professor of mathematics at Randolph-Macon College in Ashland, Virginia, where his research focuses on 19th- and early 20th-century British mathematics. His recent publications include Mathematics Unbound: The Evolution of an International Mathematical Research Community, 1800–1945, edited with Karen Hunger Parshall, and The London Mathematical Society Book of Presidents, 1865–1965, written with Susan Oakes and Alan Pears.Eve TorrenceEve Torrence (etorrenc@rmc.edu) received her Ph.D. in 1991 from the University of Virginia. She was a Clare Boothe Luce professor at Trinity College in Washington, D.C. from 1991 to 1994 and is currently an associate professor at Randolph-Macon College. She is the chair of the Maryland-District of Columbia-Virginia Section of the MAA and a member of the Pi Mu Epsilon Council. She and her husband Bruce are the co-authors of The Student's Introduction to Mathematica, A Handbook for Precalculus, Calculus, and Linear Algebra. Her areas of interest include geometry, origami, and mathematics education. She also enjoys gardening, horse riding, and playing with her children and her Australian shepherd puppy.

Ties at Rotation

Howard Lewis Penn took a Bachelor's Degree from Indiana University in 1968 and a Master's in 1969. He received his Ph.D. in 1973 from the University of Michigan. Since then, he has been at the United States Naval Academy. He was promoted to Full Professor in August, 1987. Professor Penn has had a longstanding interest in the use of computers in the teaching of mathematics and has written several papers on the subject. He is a member of the Committee on Com? puters in Mathematics Education of the Mathematical Association of America. He has been active in the Maryland-District of Columbia-Virginia section, having held several positions including Chairman. He has also worked for several summers as a computer programmer and systems analyst for the National Science Foundation. Professor Penn uses his full middle name because of the three Penns listed in the combined member?

Computer Graphics for the Vibrating String

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsHoward Lewis PennHoward Penn is an Associate Professor of mathematics at the United States Naval Academy, where he has been a faculty member since 1973. He took a Ph.D. in mathematics at the University of Michigan in 1973 and a B.A. at Indiana University in 1968. Dr. Penn has worked the last several summers as a computer systems analyst at the National Science Foundation. He has served as the Chair of the Maryland-District of Columbia-Virginia Section of the Mathematical Association of America. His current interests include Hardy spaces in several variables and computer graphics as an aid to the teaching of mathematics.

Computer Graphics for the Vibrating String

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsHoward Lewis PennHoward Penn is an Associate Professor of mathematics at the United States Naval Academy, where he has been a faculty member since 1973. He took a Ph.D. in mathematics at the University of Michigan in 1973 and a B.A. at Indiana University in 1968. Dr. Penn has worked the last several summers as a computer systems analyst at the National Science Foundation. He has served as the Chair of the Maryland-District of Columbia-Virginia Section of the Mathematical Association of America. His current interests include Hardy spaces in several variables and computer graphics as an aid to the teaching of mathematics.

Self-Inverse Integer Matrices

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsRobert HansonRobert Hanson received his Ph.D. in mathematics from Virginia Polytechnic Institute and State University under the direction of P. H. Doyle. He is Professor of Mathematics at James Madison University, Harrisonburg, Virginia, where he is currently Coordinator of Mathematics for the Department. He has served as Secretary of the Maryland-District of Columbia-Virginia Section of the M.A.A. His interests include algebra, topology, and problem solving.

November Meeting of the Maryland-District of Columbia-Virginia Section

November Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

"April Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 85(1), pp. 66–67

April Meeting of the Maryland-District of Columbia-Virginia Section

"April Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 82(9), p. 963

November Meeting of the Maryland-District of Columbia-Virginia Section

November Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

"April Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 81(8), pp. 940–941

April Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

November Meeting of the Maryland-District of Columbia-Virginia Section

November Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

"April Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 79(10), pp. 1163–1164

November Meeting of the Maryland-District of Columbia-Virginia Section

"November Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 79(3), p. 325

November Meeting of the Maryland-District of Columbia-Virginia Section

"November Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 78(7), pp. 820–821

April Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

October Meeting of the Maryland-District of Columbia-Virginia Section

"October Meeting of the Maryland-District of Columbia-Virginia Section." The American Mathematical Monthly, 77(4), pp. 441–442

April Meeting of the Maryland-District of Columbia-Virginia Section

(1969). April Meeting of the Maryland-District of Columbia-Virginia Section. The American Mathematical Monthly: Vol. 76, No. 9, pp. 1098-1098.

November Meeting of the Maryland-District of Columbia-Virginia Section

November Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section

April Meeting of the Maryland-District of Columbia-Virginia Section