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# LRhomotopies -- interface to the Littlewood-Richardson homotopies in PHCpack

Interfaces the functionality of the software PHCpack to solve Schubert problems with Littlewood-Richardson homotopies, a tool in numerical Schubert calculus. The software PHCpack is available at http://www.math.uic.edu/~jan/download.html. The site provides source code and its executable versions phc. The user must have the executable program phc available, preferably in the execution path.

## Caveat

The program "phc" (at least version 2.4.27, but preferably higher) of PHCpack needs to in the path for execution.

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/NumericalSchubertCalculus/PHCpack-LRhomotopies-doc.m2:19:0.