Siamese cat point, and tortoise-shell ("tortie") point. In the United Kingdom, all pointed Siamese-style cats are considered part of the Siamese breed. In the United States, a major cat registry, the Cat Fanciers' Association, considers only the four original fur colors as Siamese: seal point, blue point, chocolate point, and lilac point. Oriental Shorthair cats with color points in colors or patterns aside from these four are considered color point Short hairs in that registry. The World Cat Federation has also adopted this classification, treating the color point Short hair as a distinct breed. Many Siamese cats from Thailand had a kink
Fixed-point combinator grammar, transitive closure, and other types of closure operations. A function for which "every" input is a fixed point is called an identity function. Formally: In contrast to universal quantification over all formula_53, a fixed point combinator constructs "one" value that is a fixed point of formula_57. The remarkable property of a fixed point combinator is that it constructs a fixed point for an "arbitrary given" function formula_57. Other functions have the special property that after being applied once, further applications don't have any effect. More formally: Such functions are called idempotent (see also projection). An example of such a