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PHC Functions

This chapter describes interface functions for PHC pack ox server ox_sm1_phc. These interface functions are defined in the file `phc'. The file phc is
at `$(OpenXM_HOME)/lib/asir-contrib'.

nobuki@yama:~$ asir
This is Risa/Asir, Version 20020802 (Kobe Distribution).
Copyright (C) 1994-2000, all rights reserved, FUJITSU LABORATORIES LIMITED.
Copyright 2000,2001, Risa/Asir committers, http://www.openxm.org/.
GC 6.1(alpha5) copyright 2001, H-J. Boehm, A. J. Demers, Xerox, SGI, HP.
PARI 2.2.1(alpha), copyright (C) 2000,
     C. Batut, K. Belabas, D. Bernardi, H. Cohen and M. Olivier.
OpenXM/Risa/Asir-Contrib(20020804), Copyright 2000-2002, OpenXM.org
help("keyword"); ox_help(0); ox_help("keyword"); ox_grep("keyword");
     for help messages (unix version only). 
[255] phc_start();
0
[257] phc([x^2+y^2-4,x*y-1]);
The detailed output is in the file tmp.output.*
The answer is in the variable Phc.
0
[260] Phc ;
[[[-0.517638,0],[-1.93185,0]],
[[1.93185,0],[0.517638,0]],
[[-1.93185,0],[-0.517638,0]],
[[0.517638,0],[1.93185,0]]]
[261]

Author of PHC pack: Jan Verschelde.
Reference 1: Jan Verschelde, PHCpack: A general-purpose solver for polynomial systems by homotopy continuation". ACM Transaction on Mathematical Softwares, 25(2): 251-276, 1999.
Reference 2: Cox, D., O'Shea, Little, J., Using Algebraic Geometry, Springer. See the chapter on mixed volumes.

Functions

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