High frequency 3D Helmholtz FMM

Files
file	helmholtz_3d_hf_cluster.cpp
	Cluster implementation for Helmholtz 3D high frequency FMM.
file	helmholtz_3d_hf_cluster.h
	Interface of class fmm::helmholtz_3d_hf_cluster.
file	helmholtz_3d_hf_fmm.hpp
	3D high frequency Helmholtz FMM
file	helmholtz_3d_hf_level_data.cpp
	Implementation of level data for 3D Helmholtz high frequency FMM.
file	helmholtz_3d_hf_level_data.h
	level data of the the helmholtz 3d high frequency fmm

Detailed Description