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:
“Why, since man and woman were created for each other, had He made their desires so dissimilar? Why should one class of women be able to dwell in luxurious seclusion from the trials of life, while another class performed their loathsome tasks? Surely His wisdom had not decreed that one set of women should live in degradation and in the end should perish that others might live in security, preserve their frappeed chastity, and in the end be saved.”
—Madeleine [Blair], U.S. prostitute and “madam.” Madeleine, ch. 10 (1919)
“Cole’s Hill was the scene of the secret night burials of those who died during the first year of the settlement. Corn was planted over their graves so that the Indians should not know how many of their number had perished.”
—For the State of Massachusetts, U.S. public relief program (1935-1943)