PVFMM is a library for solving certain types of elliptic partial differential equations.

• We support Stokes, Poisson, and Helmholtz problems on the unit cube, with free-space or periodic boundary conditions, with constant or mildly varying coefficients. Our method is based on volume potential integral equation formulation accelerated by the Kernel Independent Fast Multipole Method.

For the latest stable release of PVFMM visit pvfmm.org

PVFMM is distributed under the LGPLv3 licence. See COPYING in the top-level directory of the distribution.

To install PVFMM, follow the steps in the INSTALL file, which is located in the top directory of the source distribution.

The file examples/Makefile can be used as a template makefile for any project using the library. In general the MakeVariables file should be included in any makefile and CXXFLAGS_PVFMM and LDFLAGS_PVFMM should be used to compile the code.

Two very simple examples illustrating usage of the library are available: For particle N-body : examples/src/example1.cpp For volume potentials: examples/src/example2.cpp

To compile these examples: make examples/bin/example1 make examples/bin/example2

• The volume potentials example will take a long time, the first time it is used, since it has to precompute quadrature rules. This data is saved to a file and used for subsequent runs. See INSTALL for the configure option '--with-precomp-dir=DIR' to set the default path for precomputed data.

This software has been developed as part of the work supported by,

• US National Institutes of Health/10042242
• US Department of Energy/DE-SC0010518
• US Department of Energy/DE-SC0009286
• US National Science Foundation/CCF-1337393
• US Air Force Office for Scientific Research /FA9550-12-10484

The authors would also like to thank ORNL/OLCF and TACC for providing access to computing resources for the development, testing and benchmarking of this software.