/usr/include/eclib/polys.h is in libec-dev 20160720-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | // polys.h : defines interface to NTL polynomials
//////////////////////////////////////////////////////////////////////////
//
// Copyright 1990-2012 John Cremona
//
// This file is part of the eclib package.
//
// eclib is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// eclib is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eclib; if not, write to the Free Software Foundation,
// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
//
//////////////////////////////////////////////////////////////////////////
// allow for multiple includes
#ifndef _POLYS_
#define _POLYS_
// NB --warning! In NTL there is a universal modulus set by a single
// call to ZZ_p::init(q).
#include "interface.h" // scalars
#include "gf.h" // scalars
#include "bigrat.h"
#include <NTL/ZZ_pX.h>
#include <NTL/ZZ_pXFactoring.h>
#define ZPoly ZZX
#define PolyCoeff(f,i) coeff((f),(i))
#define ZPolySetX(f) SetX(f);
#define SetDegree(f,d)
#define Degree(f) deg((f))
#define FqPoly ZZ_pX
#define NewFqPoly(field,name) FqPoly name
#define FqPolySetField(f,field) // do nothing
#define FqPolyAssignGF(f,c) f=((c))
#define FqPolyAssignZ(f,c) f=(to_ZZ_p(c))
#define FqPolyAssign0(f) f=to_ZZ_p(0)
#define FqPolyAssign1(f) f=to_ZZ_p(1)
#define FqPolyEval(f,c) eval((f),to_ZZ_p(c))
#define FqPolyAssignX(f) SetX(f)
#define GetField(f) (galois_field(ZZ_p::modulus()))
vector<bigint> rootsmod(const vector<bigint>& coeffs, bigint p);
vector<gf_element> roots(const FqPoly& f);
vector<bigrational> roots(const vector<bigint>& coeffs);
// find the number of roots of X^3 + bX^2 + cX + d = 0 (mod p)
int nrootscubic(const bigint& bb, const bigint& cc, const bigint& dd, const bigint& p);
FqPoly reduce(const ZPoly& f, const galois_field& Fq);
inline FqPoly reduce(const ZPoly& f, const bigint& q)
{return reduce(f,galois_field(q));}
#endif // #define _POLYS_
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