projection

Từ điển Máy Tính - Foldoc Dictionary

projection

(theory)   In domain theory, a function, f, which is (a) idempotent, i.e. f(f(x))=f(x) and (b) whose result is no more defined than its argument. E.g. F(x)=bottom or F(x)=x.

In reduction systems, a function which returns some component of its argument. E.g. head, tail, \ (x,y) . x. In a graph reduction system the function can just return a pointer to part of its argument and does not need to build any new graph.

Last updated: 1997-01-29

• Từ đồng nghĩa / Synonyms:
  expulsion, ejection, forcing out, protrusion, jut, jutting, acoustic projection, sound projection, project