John Mackey
Teaching Professor
Office
4005 Gates and Hillman Centers
jmackey@andrew.cmu.edu
Phone
(412) 268-6881
Department
Computer Science Department
Administrative Support
CSD Courses Taught
15151 - Fall, 2025
Biography
I like to hunt for elusive mathematical objects having special properties. For example, assuming that every pair of people are either acquaintances or strangers, it is not known whether it is possible to have a party of 43 people at which no five people are mutual acquaintances and no five people are mutual strangers. It may be fun for you to construct the largest conceivable party at which no three people are mutual acquaintances and no three people are mutual strangers.