Division of Science





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

Phone: (212) 650-5346
Fax: (212) 650-6294


Due to the COVID-19 crisis, all Mathematics Department operations are being performed remotely, including instruction.

The main department telephone lines at (212) 650-5346,7 are being transferred to a personal phone outside the college and will be answered roughly between noon and 6pm M-Th (as of 6/19 when Juneteenth is being celebrated, and as of next week the college is going on the usual summer reduced work week through August 7).

Preferably, email your concerns and questions to math@ccny.cuny.edu, which is also being monitored.

Staff members and administrators are either forwarding their telephone lines or monitoring their campus voicemail on a regular basis.

The Assistant Chair, Prof. Bak, and the Department Advisor for non-majors, Mr. Park and Mr. Turner, are holding regular online advising hours during which you can contact them in real time. The details of these can be found on our Administration page which can be accessed via the left side bar or you can click here.

Instructor office hours are also being held remotely. You can either visit the individual instructor's page for details, or look at the master list by clicking here.

We hope everyone stays safe and healthy, and we look forward to seeing each other in person once again.

Meet the Platonic Solids: Icosahedron

From http://commons.wikimedia.org/wiki/Main_Page

The Platonic solids have been known since antiquity, and they play a prominent role in Plato's description of the physical world. The planar faces of each solid are identical polygons. Only equilateral triangles, squares and regular pentagons appear.

Although the platonic solids seem to be purely geometric objects, they embody a number of deep algebraic features. Their symmetries, for example, relate to the solution of polynomial equations of low degree.

If you would like to learn more about Platonic solids, you can start here.