In 1930 he earned his doctorate in geometry under the supervision of Walter Meyer, and a degree in actuarial science in 1931.

He earned his PhD in 1990 from Stanford University, under the supervision of Alexander George.

He attended Princeton University, earning his doctorate in 1971 under the supervision of Kenkichi Iwasawa.

He then earned a doctorate in mathematics from Columbia University in 1917 under the supervision of Edward Kasner.

In 1953 he earned a PhD from New York University, under the supervision of Fritz John.

He was a well-published researcher before he earned his PhD in 1968 under the supervision of Lewis Binford.

In 1928, he earned a doctorate in psychology, under the supervision of Karl Bühler.

He earned his doctorate there in 1937, under the supervision of David Widder).

She earned a doctorate from the University of California, Berkeley in 1974, under the supervision of Andrew Ogg.

He earned his Ph.D. under the supervision of V. I. Arnold.