Luther Pfahler Eisenhart (1876-1965). Born in York,
Pennsylvania, U.S.A. Studied mathematics at John Hopkins
University, Baltimore and received his doctorate in 1900. Eisenhart
taught at the University of Princeton from 1900, was promoted to
professor in 1909 and remained there (as Dean of the mathematical
Faculty and Dean of the Graduate School) until his retirement in
1945. All his work is in differential geometry, including
Riemannian and non-Riemannian geometry and in group theory.