G. B. Halsted

George Bruce Halsted
G. B. Halsted, geometer
Born(1853-11-25)November 25, 1853
DiedMarch 16, 1922(1922-03-16) (aged 68)
New York City, New York, US
Alma materPrinceton University
Johns Hopkins University
Known forFoundations of geometry
SpouseMargaret Swearingen
Scientific career
FieldsGeometry
InstitutionsUniversity of Texas, Austin
Kenyon College
Colorado State Teachers College
Thesis Basis for a Dual Logic  (1879)
Doctoral advisorJ. J. Sylvester
Notable studentsR. L. Moore
L. E. Dickson

George Bruce Halsted (November 25, 1853 – March 16, 1922), usually cited as G. B. Halsted, was an American mathematician who explored foundations of geometry and introduced non-Euclidean geometry into the United States through his translations of works by Bolyai, Lobachevski, Saccheri, and Poincaré. He wrote an elementary geometry text, Rational Geometry, based on Hilbert's axioms, which was translated into French, German, and Japanese. Halsted produced original works in synthetic geometry, first with an elementary text in 1896, and with a text on synthetic projective geometry in 1906.