Class Number

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:

    “I never feel so conscious of my race as I do when I stand before a class of twenty-five young men and women eager to learn about what it is to be black in America.”
    —Claire Oberon Garcia, African American college professor. As quoted in the Chronicle of Higher Education, p. B3 (July 27, 1994)

    “It seems to me that there must be an ecological limit to the number of paper pushers the earth can sustain, and that human civilization will collapse when the number of, say, tax lawyers exceeds the world’s total population of farmers, weavers, fisherpersons, and pediatric nurses.”
    —Barbara Ehrenreich (b. 1941)