inline
bool MultiIndex<I, DIMENSION>::lex (const MultiIndex<I, DIMENSION>& lambda) const
{
return std::lexicographical_compare(FixedArray1D<I, DIMENSION>::begin(),
FixedArray1D<I, DIMENSION>::end(),
lambda.begin(), lambda.end());
}
inline
bool MultiIndex<I, DIMENSION>::operator < (const MultiIndex& lambda) const
{
unsigned int r1(FixedArray1D<I,DIMENSION>::operator [] (0)),r2(multi_degree(lambda));
for (unsigned int i(1); i < DIMENSION; i++)
{
r1 += FixedArray1D<I,DIMENSION>::operator [] (i);
}
return (r1<r2) || ((r1==r2) && (std::lexicographical_compare(FixedArray1D<I, DIMENSION>::begin(),
FixedArray1D<I, DIMENSION>::end(),
lambda.begin(), lambda.end()) ));
}