hi(inner_product)
    itemization(
        it() Header file: tt(<numeric>)
        it() Function prototypes:
        itemization(
            itt(Type inner_product(InputIterator1 first1,
                InputIterator1 last1, InputIterator2 first2, Type init);)
            itt(Type inner_product(InputIterator1 first1,
                InputIterator1 last1, InputIterator2 first2, Type init,
                BinaryOperator1 op1, BinaryOperator2 op2);)
        )
        it() Description:
        itemization(
            it() The first prototype: the sum of all pairwise products of the
elements implied by the range rangett(first1, last1) and the same number of
elements starting at the element pointed to by tt(first2) are added to
tt(init), and this sum is returned. The function uses the tt(operator+) and
tt(operator*) of the data type to which the iterators point.
            it() The second prototype: binary operator tt(op1) instead of the
default addition operator, and binary operator tt(op2) instead of the default
multiplication operator are applied to all pairwise elements implied by the
range rangett(first1, last1) and the same number of elements starting at the
element pointed to by tt(first2). The results of the binary operator calls are
added to tt(init) and tt(init)'s  final value is returned.
        )
        it() Example:
        verbinclude(-a examples/innerproduct.cc)
    )