Pafnuty Lvovich
Chebyshev

St. Petersburg State University (MathTree)


Andrei
Markov

University of St. Petersburg (Neurotree)


Jacob
Tamarkin

Brown (Neurotree)


David
Hilbert

Universität Göttingen (Physics Tree)


Richard
Courant

NYU (Physics Tree)


William
Feller

Universität Göttingen (MathTree)



J. Alan
George

University of Waterloo
(Options)

J. GeorgeX