Integral operator and Weighted residual representations

Files
file	double_integral.hpp
	declaration of class double_integral and its specialisations
file	integral_operator.hpp
	declaration of class NiHu::integral_operator
file	integral_transform.hpp
	declaration of integral_transform classes
file	single_integral.hpp
	declaration of class single_integral
file	weighted_residual.hpp
	declaration of class NiHu::weighted_residual

Detailed Description