William Caspar Graustein

William Caspar Graustein
Left to right, upper: Graustein, Smith, lower: Rellich, Mary Graustein, at the ICM, Zürich 1932.
Born(1888-11-15)15 November 1888
Died22 January 1941(1941-01-22) (aged 52)
NationalityAmerican
Alma materHarvard University
SpouseMary Florence (nee Curtis)
Scientific career
FieldsMathematics
InstitutionsHarvard University
Doctoral advisorEduard Study

William Caspar Graustein (15 November 1888 – 22 January 1941) was an American mathematician. He graduated magna cum laude from Harvard University in 1910 and later became an instructor at Harvard University. In 1921, he married Mary Curtis Graustein (18841972), who was the first American woman to earn a mathematics Ph.D. (1917) from Radcliffe College.

He died in an automobile accident, at the age of 52. At the time, Graustein was professor of mathematics and assistant dean at Harvard.