出典:Wikipedia
出典:『Wikipedia』 (2011/04/17 12:38 UTC 版)
In mathematics, especially in set theory, two ordered sets X,Y are said to have the same order type just when they are order isomorphic, that is, when there exists a bijection f: X → Y such that both f and its inverse are monotone (order preserving). (In the special case when X is totally ordered, monotonicity of f implies monotonicity of its inverse.)
a kind
the Composite order
the natural shape or form of something
the mode of a proposition
to throw anything out of shape