https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/solve-the-Poisson-equation-with-d-Helmholtz-2D/m-p/831918#M5690 <P>Hi~</P><P>and u/y=0|(y=0,y=Ly). This is the Poisson equation. Because the Poisson problem is a special case of the Helmholtz problem. I want to use d_Helmholtz_2D(f, bd_ax, bd_bx, bd_ay, bd_by, bd_az, bd_bz, &amp;xhandle, &amp;yhandle, ipar, dpar, &amp;stat)to solve the eqution with =0. Poisson Library uses the standard five-point finite difference approximation on this mesh to compute the approximation to the solution .It asks for f ,but I have no ideas on setting f on the boundary . In my opinion it is poisson eqution with the Neumann boundary condition,so should I set f=0 in the boundary?Or any advise?Thank you!! </P> Fri, 29 Apr 2011 08:37:02 GMT zwgoodqq_com 2011-04-29T08:37:02Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/solve-the-Poisson-equation-with-d-Helmholtz-2D/m-p/831918#M5690 <P>Hi~</P><P>and u/y=0|(y=0,y=Ly). This is the Poisson equation. Because the Poisson problem is a special case of the Helmholtz problem. I want to use d_Helmholtz_2D(f, bd_ax, bd_bx, bd_ay, bd_by, bd_az, bd_bz, &amp;xhandle, &amp;yhandle, ipar, dpar, &amp;stat)to solve the eqution with =0. Poisson Library uses the standard five-point finite difference approximation on this mesh to compute the approximation to the solution .It asks for f ,but I have no ideas on setting f on the boundary . In my opinion it is poisson eqution with the Neumann boundary condition,so should I set f=0 in the boundary?Or any advise?Thank you!! </P> Fri, 29 Apr 2011 08:37:02 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/solve-the-Poisson-equation-with-d-Helmholtz-2D/m-p/831918#M5690 zwgoodqq_com 2011-04-29T08:37:02Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/solve-the-Poisson-equation-with-d-Helmholtz-2D/m-p/831919#M5691 Hi,<DIV>I've answered in <A href="http://software.intel.com/en-us/forums/showthread.php?t=82386">next topic</A></DIV><DIV>With best regards,</DIV><DIV>Alexander Kalinkin</DIV> Fri, 29 Apr 2011 09:27:13 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/solve-the-Poisson-equation-with-d-Helmholtz-2D/m-p/831919#M5691 Alexander_K_Intel2 2011-04-29T09:27:13Z