In mathematics, class number may refer to
- Class number (group theory), the number of conjugacy classes of a group
- The size of the ideal class group of a number ring
- The number of equivalence classes of binary quadratic forms of a given discriminant
Famous quotes containing the words class and/or number:
“It is certain that every class is interested in [educational] establishments which give to the human mind its highest improvements, and to every Country its truest and most durable celebrity.”
—James Madison (1751–1836)
“In many ways, life becomes simpler [for young adults]. . . . We are expected to solve only a finite number of problems within a limited range of possible solutions. . . . It’s a mental vacation compared with figuring out who we are, what we believe, what we’re going to do with our talents, how we’re going to solve the social problems of the globe . . .and what the perfect way to raise our children will be.”
—Roger Gould (20th century)