| bind1st | bind the first argument of the binary function |
| bind2nd | bind the second argument of the binary function |
| equal_to | whether the first argument is equal to the second argument |
| greater | whether the first argument is greater than the second argument |
| greater_equal | whether the first argument is greater than or equal to the second argument |
| less | whether the first argument is less than the second argument |
| less_equal | whether the first argument is less than or equal to the second argument |
| mem_fun | construct a functor from a member function(pointer type) |
| mem_fun_ref | construct a functor from a member function(reference type) |
| not1 | negation of a unary predicate |
| not2 | negation of a binary predicate |
| ptr_fun | construct a functor from a function pointer |