Ray Rosentrater

Ray Rosentrater

Professor of Mathematics
Phone: (805) 565-6185
Email: rosentr@westmont.edu
Office Location: Winter Hall 302

Office Hours
Mon. 11:30 – 12:30
Tues. 10:00 – 11:30
Wed. 2:30 –3:15
Thurs. 1:30 –3:00

Specialization
Operator theory

Professor Rosentrater has taught at Westmont since 1980, and has won the Teacher of the Year Award and the Faculty Research Award. He held a Fulbright fellowship in 1995. He commutes about 10 miles one way by bicylcle almost daily to work.

Course web pages

Professor Rosentrater teaches

  • Calculus
  • Linear algebra
  • Discrete mathematics
  • Fundamentals of mathematics
  • Real Analysis

Education

  • Ph.D. in Mathematics, Indiana University
  • M.Sc. in Computer Science, University of Toronto
  • M.S. in Mathematics, Indiana University
  • B.A. in Mathematics, Messiah College

Research Interests

  • Operator theory

Selected Publications

  • Varieties of Integration, Dolciani Mathematical Expositions, Mathematical Association of America, 2015.
  • (with Kim Jongerius) “Infinity.” Mathematics Through the Eyes of Faith. Ed. James Bradley and Russell Howell, 2011. 37-63.
  • (with Kim Jongerius) “Dimension.” Mathematics Through the Eyes of Faith. Ed. James Bradley and Russell Howell, 2011. 64-92.
  • "Representational Efficiency." Mathematics Magazine, 64 (2011), 185-195.
  • (with Jim Gleason) “Xia’s Analytic Model of a subnormal Operator and its Applications.” Rocky
    Mountain Journal of Mathematics. 38:3 (2008), 849-890.
  • (with Jim Gleason) “The Mosaic and Principal Function of a Subnormal Operator.” Integral Equations
    and Operator Theory, 55 (2006), 69-82.
  • “Another Stick-Breaking Game: Problem 11089.” The American Mathematical Monthly, 113 (2006),
    571-572.
  • “The Sample Correlation Coefficient from a Linear Algebra Perspective.” The College Mathematics
    Journal, 36 (2006), 47-50.