lrs home page
lrslib Ver 6.2 is a self-contained ANSI
C implementation of the reverse search algorithm for vertex
enumeration/convex hull problems and comes with a choice of three arithmetic packages.
Input file formats are compatible with Komei Fukuda's cdd
package. All computations
are done exactly in either multiple precision or fixed
integer arithmetic. Output is not stored in memory, so
even problems with very large output sizes can sometimes be
solved. The program is intended for Unix/Linux platforms, but will
compile using gcc/cygwin on Windows.
New: Beta release of v7.0: hybrid arithmetic versions of plrs/mplrs offer
speedups of 2-5 times for combinatorial polytopes.
lrslib Guide Theoretical Description
Results (new) mplrs:Theoretical
of a polyhedron to a V-representation (vertex/ray) or vice versa.
Estimates the number of vertices/rays or facets of a
polyhedron. Computes the volume of a polytope given by a list of
vertices. Solves LP problems over a polyhedron given by an
H-representation. Compute the Voronoi vertices and rays for an
input set of data points. quickstart
- plrs: C++ wrapper
for lrs that allows for parallelization using the Boost library
on shared memory multi-core machines and is described here
- (new in
C wrapper for lrs that allows for parallelization on clusters of
machines and uses the MPI library quickstart
- redund: Removes redundant
inequalities from an H-representation. Finds the extremal
vertices in a V-representation
- (major revision in 6.1)
lrsnash, 2nash: Computes all Nash
equlibria of a two person non-cooperative game. 2nash is a
2-processor parallel version
- fourier: Temporarily withdrawn due to reported bugs.
GeoCalcLib, an interface
to lrs and redund developed by Rainer Schaich
- lrslib: A
callable library of functions implementing the above drivers
- lrsnash: A callable
library of routines for computing Nash equilibria (used with
- lrsmp: A multiple
precision arithmetic package for lrslib
- lrslong: A fixed precision
integer package for lrslib
- lrsgmp: A multiple
precision arithmetic package for lrslib based on GNU MP.
to related software
- vedemo.c Compute vertices of a set of
a set of generated cyclic polytopes
of linear programs for generated hypercubes
The program can be distributed freely under the
GNU GENERAL PUBLIC LICENSE. Please read the file COPYING
carefully before using.
Informatics, Kyoto University and School of Computer Science, McGill University