Global Square

Global square is an important concept in set theory, a branch of mathematics. Define Sing to be the class of all limit ordinals which are not regular. Global square states that there is a system satisfying:

  1. is a club set of .
  2. ot
  3. If is a limit point of then and

Famous quotes containing the words global and/or square:

    Much of what Mr. Wallace calls his global thinking is, no matter how you slice it, still “globaloney.” Mr. Wallace’s warp of sense and his woof of nonsense is very tricky cloth out of which to cut the pattern of a post-war world.
    Clare Boothe Luce (1903–1987)

    Interpreting the dance: young women in white dancing in a ring can only be virgins; old women in black dancing in a ring can only be witches; but middle-aged women in colors, square dancing...?
    Mason Cooley (b. 1927)