Groups. Mathematical term,
Brewster, Helen Barten. *4490a.113.1 Collineations of space which leave invariant a quadric surface. (In Kansas University Science Bulletin. Vol. 1, pp. 281-303.
Lawrence. 1902.) Treats of groups of collineations.
This card was printed at the Boston Public Library, April 20, 1906. G1328 — Groups. Mathematical term. — Surfaces. Quadric.