ELLPACK is implemented as a Fortran preprocessor supported by a large software library. Its very high level language can reduce the programming effort for a "routine" elliptic problem by a factor of a hundred or more. Its flexibility allows one to handle the "messy" aspects of many real problems by detailed Fortran code and still use its simple language and powerful library for the rest of the solution. ELLPACK is portable and has been run in a variety of computer environments. Its installation requires a Fortran compiler, the ability to create a Fortran library, and the machine constants for one small program. It can be brought up in an afternoon by someone familiar with the local system.
ELLPACK has the following problem solving capabilities using minimal programming.
|EQUATION.||UXX + Y*UYY + SIN(X+Y)*U = 1 - X + Y|
|BOUNDARY.||U = 0||ON||X = 0.|
|U = Y||ON||X = 1.|
|U = 0||ON||Y = 0.|
|U = X||ON||Y = 1.|
|GRID.||21 X POINTS $ 21 Y POINTS|
|OUTPUT.||PLOT(U) $ TABLE(U)|
John Rice's Home Page
ELLPACK Home Page
Purdue University Department of Computer Sciences