Abstract

PLTMG 13.0 is a package for solving elliptic partial differential equations in general regions of the plane. It is based on a family of continuous Lagrange triangular finite elements. PLTMG features options for adaptive h, p, and hp refinement, coarsening, and mesh moving. PLTMG employes several algebraic multilevel solvers for the resulting systems of linear equations. PLTMG provides a suite of continuation options to handle PDEs with parameter dependencies. It also provides options for solving several classes of optimal control and obstacle problems. The package includes an initial mesh generator and several graphics packages. Support for the Bank-Holst parallel adaptive meshing paradigm and corresponding domain decomposition solver are also provided. PLTMG is provided as Fortran90 (and a little C) source code. The code has an interface to MPI. The MPI interface requires libraries that are NOT provided as part of the PLTMG package. PLTMG 13.0 uses Chris Deotte's package WEBGUI 1.0 as its graphical user interface. WEBGUI 1.0 is included as part of the PLTMG source code, but is also available independently.