Academic Ancestors of Doron Zeilberger

Doron Zeilberger's (Ph.D., Weizmann Institute,1976) thesis advisor was

Harry Dym (Ph.D, MIT, 1965); Dym's thesis advisor was

Henry P. McKean (Ph.D., Princeton, 1955); McKean's thesis advisor was

William Feller(Ph.D., Gottingen, 1926); Feller's thesis advisor was

Richard Courant(Ph.D., Gottingen, 1910); Courant's thesis advisor was

David Hilbert(Ph.D.,Konisberg, 1885)

Above Hilbert, we have:

 Pl"ucker-?
 / 
Hilbert-Lindemann-Klein Poisson
 \ / \
 Lipschitz-Dirichlet Lagrange-?
 \ /
 Fourier