wfmm_WFMM Openmp version wideband FMM for 2D complex Helmholtz equation.zip-This is the code for the Wideband Fast Multipole Method for 2D Helmholtz equation.testrun.c is a test or demonstration file to use　wfmm() . By modifying testrun.c file, the Wideband FMM can be used. Instruction1.Unzip the file wfmm.zip.2.Compile with gcc version 4.2 or newer (GNU compiler) by typing >> make3.Run>>./testwfmm4.Output will be save in the fmmlog.txt fileIn default, N　 300*300 in [-10, 10]^2 box, k.re　　1.0, k.im　 0.0, and NT　 8 (number of cores, defined in　wfmm.h ) are used. The　error　in fmmlog.txt file must be around 5.043416e-07. It will slightly vary depending on machine and compiler version. (The　sample_output.pdf　file is one of　fmmlog.txt　file)Also note that the CPU time for FMM and direct calculation will be differ　the table depending on the computers and complier.In order to generate table in the paper, change N, k.re and k.im in the testrun.c file to the number specified in the table and th