Quote of the day
Like stones rolling down hills, fair ideas reach their objectives despite all obstacles and barriers. It may be possible to speed or hinder them, but impossible to stop them.
Hartley Rogers Jr.

Born: 1926
Died: July 17, 2015 (aged 89)
Bio: Hartley Rogers Jr. was a mathematician who worked in recursion theory, and was a professor in the Mathematics Department of the Massachusetts Institute of Technology. The Rogers equivalence theorem is named after him.