combination

Từ điển Máy Tính - Foldoc Dictionary

combination

1.   (mathematics)   A set containing a certain number of objects selected from another set.

The number of combinations of r objects chosen from a set of n is

 n C r = n! / ((n-r)! r!) 

where "n C r" is normally with n and r as subscripts or as n above r in parentheses.

See also permutation.

2.   (reduction)   In the theory of combinators, a combination denotes an expression in which function application is the only operation.

Last updated: 1995-04-10

• Từ đồng nghĩa / Synonyms:
  combining, compounding