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:
“But you must know the class of sweet women—who are always so happy to declare “they have all the rights they want”; “they are perfectly willing to let their husbands vote for them”Mare and always have been numerous, though it is an occasion for thankfulness that they are becoming less so.”
—Eliza “Mother” Stewart (1816–1908)
“Even in ordinary speech we call a person unreasonable whose outlook is narrow, who is conscious of one thing only at a time, and who is consequently the prey of his own caprice, whilst we describe a person as reasonable whose outlook is comprehensive, who is capable of looking at more than one side of a question and of grasping a number of details as parts of a whole.”
—G. Dawes Hicks (1862–1941)