Division of Science

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Contact

Department of Mathematics
The City College of New York
160 Convent Avenue
New York, NY 10031

Phone: (212) 650-5346
Fax: (212) 650-6294
math@ccny.cuny.edu

Ralph Kopperman

Position
Professor Emeritus
Email
rdkcc@ccny.cuny.edu
Office
NAC 6/291A
Office phone
(212) 650-5125

I am interested in the foundations of general topology, particularly involving spaces in which a point can be in the closure of another, while the other is not in the closure of the first. These spaces have recently had applications in computer science, especially:

  • digital topology, in which the computer screen (which looks like a rectangle in the plane but has only a finite number of points),

  • continuous posets, a branch of computer logic, and

  • approximation of topological spaces by finite spaces.

Teaching

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