X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fcolor.cpp;h=7d71facf896eb9aca5b0f32126ec4dc0a7480678;hp=9e719ec051cecbb914e3e1b59138f8e4cd8286c4;hb=9ee91eb062955a6c0ad22a34628c934ba0c888dd;hpb=6c9a7dfd6b92368b21a2fe5aaf3638bc849099ba diff --git a/ginac/color.cpp b/ginac/color.cpp index 9e719ec0..7d71facf 100644 --- a/ginac/color.cpp +++ b/ginac/color.cpp @@ -3,7 +3,7 @@ * Implementation of GiNaC's color (SU(3) Lie algebra) objects. */ /* - * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -20,19 +20,19 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#include +#include #include #include "color.h" -#include "ex.h" #include "idx.h" #include "ncmul.h" +#include "symmetry.h" #include "numeric.h" +#include "mul.h" #include "power.h" // for sqrt() #include "symbol.h" #include "print.h" #include "archive.h" -#include "debugmsg.h" #include "utils.h" namespace GiNaC { @@ -44,12 +44,11 @@ GINAC_IMPLEMENT_REGISTERED_CLASS(su3f, tensor) GINAC_IMPLEMENT_REGISTERED_CLASS(su3d, tensor) ////////// -// default constructor, destructor, copy constructor assignment operator and helpers +// default ctor, dtor, copy ctor, assignment operator and helpers ////////// color::color() : representation_label(0) { - debugmsg("color default constructor", LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_color; } @@ -74,7 +73,6 @@ DEFAULT_CTORS(su3d) * @see color_ONE */ color::color(const ex & b, unsigned char rl) : inherited(b), representation_label(rl) { - debugmsg("color constructor from ex,unsigned char", LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_color; } @@ -83,19 +81,16 @@ color::color(const ex & b, unsigned char rl) : inherited(b), representation_labe * @see color_T */ color::color(const ex & b, const ex & i1, unsigned char rl) : inherited(b, i1), representation_label(rl) { - debugmsg("color constructor from ex,ex,unsigned char", LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_color; } -color::color(unsigned char rl, const exvector & v, bool discardable) : inherited(indexed::unknown, v, discardable), representation_label(rl) +color::color(unsigned char rl, const exvector & v, bool discardable) : inherited(sy_none(), v, discardable), representation_label(rl) { - debugmsg("color constructor from unsigned char,exvector", LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_color; } -color::color(unsigned char rl, exvector * vp) : inherited(indexed::unknown, vp), representation_label(rl) +color::color(unsigned char rl, exvector * vp) : inherited(sy_none(), vp), representation_label(rl) { - debugmsg("color constructor from unsigned char,exvector *", LOGLEVEL_CONSTRUCT); tinfo_key = TINFO_color; } @@ -105,7 +100,6 @@ color::color(unsigned char rl, exvector * vp) : inherited(indexed::unknown, vp), color::color(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst) { - debugmsg("color constructor from archive_node", LOGLEVEL_CONSTRUCT); unsigned rl; n.find_unsigned("label", rl); representation_label = rl; @@ -124,12 +118,12 @@ DEFAULT_ARCHIVING(su3f) DEFAULT_ARCHIVING(su3d) ////////// -// functions overriding virtual functions from bases classes +// functions overriding virtual functions from base classes ////////// int color::compare_same_type(const basic & other) const { - GINAC_ASSERT(other.tinfo() == TINFO_color); + GINAC_ASSERT(is_a(other)); const color &o = static_cast(other); if (representation_label != o.representation_label) { @@ -140,6 +134,14 @@ int color::compare_same_type(const basic & other) const return inherited::compare_same_type(other); } +bool color::match_same_type(const basic & other) const +{ + GINAC_ASSERT(is_a(other)); + const color &o = static_cast(other); + + return representation_label == o.representation_label; +} + DEFAULT_COMPARE(su3one) DEFAULT_COMPARE(su3t) DEFAULT_COMPARE(su3f) @@ -156,7 +158,6 @@ ex color::simplify_ncmul(const exvector & v) const { exvector s; s.reserve(v.size()); - unsigned rl = ex_to_color(v[0]).get_representation_label(); // Remove superfluous ONEs exvector::const_iterator it = v.begin(), itend = v.end(); @@ -166,8 +167,8 @@ ex color::simplify_ncmul(const exvector & v) const it++; } - if (s.size() == 0) - return color(su3one(), rl); + if (s.empty()) + return color(su3one(), representation_label); else return simplified_ncmul(s); } @@ -216,13 +217,13 @@ static ex permute_free_index_to_front(const exvector & iv3, const exvector & iv2 /** Automatic symbolic evaluation of indexed symmetric structure constant. */ ex su3d::eval_indexed(const basic & i) const { - GINAC_ASSERT(is_of_type(i, indexed)); + GINAC_ASSERT(is_a(i)); GINAC_ASSERT(i.nops() == 4); - GINAC_ASSERT(is_ex_of_type(i.op(0), su3d)); + GINAC_ASSERT(is_a(i.op(0))); // Convolutions are zero - if (static_cast(i).get_dummy_indices().size() != 0) - return _ex0(); + if (!(static_cast(i).get_dummy_indices().empty())) + return _ex0; // Numeric evaluation if (static_cast(i).all_index_values_are(info_flags::nonnegint)) { @@ -230,7 +231,7 @@ ex su3d::eval_indexed(const basic & i) const // Sort indices int v[3]; for (unsigned j=0; j<3; j++) - v[j] = ex_to_numeric(ex_to_idx(i.op(j + 1)).get_value()).to_int(); + v[j] = ex_to(ex_to(i.op(j + 1)).get_value()).to_int(); if (v[0] > v[1]) std::swap(v[0], v[1]); if (v[0] > v[2]) std::swap(v[0], v[2]); if (v[1] > v[2]) std::swap(v[1], v[2]); @@ -240,18 +241,18 @@ ex su3d::eval_indexed(const basic & i) const // Check for non-zero elements if (CMPINDICES(1,4,6) || CMPINDICES(1,5,7) || CMPINDICES(2,5,6) || CMPINDICES(3,4,4) || CMPINDICES(3,5,5)) - return _ex1_2(); + return _ex1_2; else if (CMPINDICES(2,4,7) || CMPINDICES(3,6,6) || CMPINDICES(3,7,7)) - return _ex_1_2(); + return _ex_1_2; else if (CMPINDICES(1,1,8) || CMPINDICES(2,2,8) || CMPINDICES(3,3,8)) - return sqrt(_ex3())/3; + return sqrt(_ex3)*_ex1_3; else if (CMPINDICES(8,8,8)) - return -sqrt(_ex3())/3; + return sqrt(_ex3)*_ex_1_3; else if (CMPINDICES(4,4,8) || CMPINDICES(5,5,8) || CMPINDICES(6,6,8) || CMPINDICES(7,7,8)) - return -sqrt(_ex3())/6; + return sqrt(_ex3)/_ex_6; else - return _ex0(); + return _ex0; } // No further simplifications @@ -261,9 +262,9 @@ ex su3d::eval_indexed(const basic & i) const /** Automatic symbolic evaluation of indexed antisymmetric structure constant. */ ex su3f::eval_indexed(const basic & i) const { - GINAC_ASSERT(is_of_type(i, indexed)); + GINAC_ASSERT(is_a(i)); GINAC_ASSERT(i.nops() == 4); - GINAC_ASSERT(is_ex_of_type(i.op(0), su3f)); + GINAC_ASSERT(is_a(i.op(0))); // Numeric evaluation if (static_cast(i).all_index_values_are(info_flags::nonnegint)) { @@ -271,7 +272,7 @@ ex su3f::eval_indexed(const basic & i) const // Sort indices, remember permutation sign int v[3]; for (unsigned j=0; j<3; j++) - v[j] = ex_to_numeric(ex_to_idx(i.op(j + 1)).get_value()).to_int(); + v[j] = ex_to(ex_to(i.op(j + 1)).get_value()).to_int(); int sign = 1; if (v[0] > v[1]) { std::swap(v[0], v[1]); sign = -sign; } if (v[0] > v[2]) { std::swap(v[0], v[2]); sign = -sign; } @@ -282,13 +283,13 @@ ex su3f::eval_indexed(const basic & i) const return sign; else if (CMPINDICES(1,4,7) || CMPINDICES(2,4,6) || CMPINDICES(2,5,7) || CMPINDICES(3,4,5)) - return _ex1_2() * sign; + return _ex1_2 * sign; else if (CMPINDICES(1,5,6) || CMPINDICES(3,6,7)) - return _ex_1_2() * sign; + return _ex_1_2 * sign; else if (CMPINDICES(4,5,8) || CMPINDICES(6,7,8)) - return sqrt(_ex3())/2 * sign; + return sqrt(_ex3)/2 * sign; else - return _ex0(); + return _ex0; } // No further simplifications @@ -299,14 +300,19 @@ ex su3f::eval_indexed(const basic & i) const /** Contraction of generator with something else. */ bool su3t::contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const { - GINAC_ASSERT(is_ex_of_type(*self, indexed)); - GINAC_ASSERT(is_ex_of_type(*other, indexed)); + GINAC_ASSERT(is_a(*self)); + GINAC_ASSERT(is_a(*other)); GINAC_ASSERT(self->nops() == 2); - GINAC_ASSERT(is_ex_of_type(self->op(0), su3t)); - unsigned char rl = ex_to_color(*self).get_representation_label(); + GINAC_ASSERT(is_a(self->op(0))); + unsigned char rl = ex_to(*self).get_representation_label(); if (is_ex_exactly_of_type(other->op(0), su3t)) { + // Contraction only makes sense if the represenation labels are equal + GINAC_ASSERT(is_a(*other)); + if (ex_to(*other).get_representation_label() != rl) + return false; + // T.a T.a = 4/3 ONE if (other - self == 1) { *self = numeric(4, 3); @@ -317,7 +323,7 @@ bool su3t::contract_with(exvector::iterator self, exvector::iterator other, exve } else if (other - self == 2 && is_ex_of_type(self[1], color)) { *self = numeric(-1, 6); - *other = _ex1(); + *other = _ex1; return true; // T.a S T.a = 1/2 Tr(S) - 1/6 S @@ -331,14 +337,14 @@ bool su3t::contract_with(exvector::iterator self, exvector::iterator other, exve } it = self + 1; - ex S = _ex1(); + ex S = _ex1; while (it != other) { S *= *it; - *it++ = _ex1(); + *it++ = _ex1; } *self = color_trace(S, rl) * color_ONE(rl) / 2 - S / 6; - *other = _ex1(); + *other = _ex1; return true; } } @@ -349,31 +355,55 @@ bool su3t::contract_with(exvector::iterator self, exvector::iterator other, exve /** Contraction of an indexed symmetric structure constant with something else. */ bool su3d::contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const { - GINAC_ASSERT(is_ex_of_type(*self, indexed)); - GINAC_ASSERT(is_ex_of_type(*other, indexed)); + GINAC_ASSERT(is_a(*self)); + GINAC_ASSERT(is_a(*other)); GINAC_ASSERT(self->nops() == 4); - GINAC_ASSERT(is_ex_of_type(self->op(0), su3d)); + GINAC_ASSERT(is_a(self->op(0))); if (is_ex_exactly_of_type(other->op(0), su3d)) { // Find the dummy indices of the contraction - exvector dummy_indices; - dummy_indices = ex_to_indexed(*self).get_dummy_indices(ex_to_indexed(*other)); - - // d.abc*d.abc=40/3 + exvector self_indices = ex_to(*self).get_indices(); + exvector other_indices = ex_to(*other).get_indices(); + exvector all_indices = self_indices; + all_indices.insert(all_indices.end(), other_indices.begin(), other_indices.end()); + exvector free_indices, dummy_indices; + find_free_and_dummy(all_indices, free_indices, dummy_indices); + + // d.abc d.abc = 40/3 if (dummy_indices.size() == 3) { *self = numeric(40, 3); - *other = _ex1(); + *other = _ex1; return true; - // d.akl*d.bkl=5/3*delta.ab + // d.akl d.bkl = 5/3 delta.ab } else if (dummy_indices.size() == 2) { - exvector a = index_set_difference(ex_to_indexed(*self).get_indices(), dummy_indices); - exvector b = index_set_difference(ex_to_indexed(*other).get_indices(), dummy_indices); - GINAC_ASSERT(a.size() > 0); - GINAC_ASSERT(b.size() > 0); - *self = numeric(5, 3) * delta_tensor(a[0], b[0]); - *other = _ex1(); + exvector a; + std::back_insert_iterator ita(a); + ita = set_difference(self_indices.begin(), self_indices.end(), dummy_indices.begin(), dummy_indices.end(), ita, ex_is_less()); + ita = set_difference(other_indices.begin(), other_indices.end(), dummy_indices.begin(), dummy_indices.end(), ita, ex_is_less()); + GINAC_ASSERT(a.size() == 2); + *self = numeric(5, 3) * delta_tensor(a[0], a[1]); + *other = _ex1; + return true; + } + + } else if (is_ex_exactly_of_type(other->op(0), su3t)) { + + // d.abc T.b T.c = 5/6 T.a + if (other+1 != v.end() + && is_ex_exactly_of_type(other[1].op(0), su3t) + && ex_to(*self).has_dummy_index_for(other[1].op(1))) { + + exvector self_indices = ex_to(*self).get_indices(); + exvector dummy_indices; + dummy_indices.push_back(other[0].op(1)); + dummy_indices.push_back(other[1].op(1)); + int sig; + ex a = permute_free_index_to_front(self_indices, dummy_indices, sig); + *self = numeric(5, 6); + other[0] = color_T(a, ex_to(other[0]).get_representation_label()); + other[1] = _ex1; return true; } } @@ -384,30 +414,49 @@ bool su3d::contract_with(exvector::iterator self, exvector::iterator other, exve /** Contraction of an indexed antisymmetric structure constant with something else. */ bool su3f::contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const { - GINAC_ASSERT(is_ex_of_type(*self, indexed)); - GINAC_ASSERT(is_ex_of_type(*other, indexed)); + GINAC_ASSERT(is_a(*self)); + GINAC_ASSERT(is_a(*other)); GINAC_ASSERT(self->nops() == 4); - GINAC_ASSERT(is_ex_of_type(self->op(0), su3f)); + GINAC_ASSERT(is_a(self->op(0))); if (is_ex_exactly_of_type(other->op(0), su3f)) { // f*d is handled by su3d class // Find the dummy indices of the contraction exvector dummy_indices; - dummy_indices = ex_to_indexed(*self).get_dummy_indices(ex_to_indexed(*other)); + dummy_indices = ex_to(*self).get_dummy_indices(ex_to(*other)); - // f.abc*f.abc=24 + // f.abc f.abc = 24 if (dummy_indices.size() == 3) { *self = 24; - *other = _ex1(); + *other = _ex1; return true; - // f.akl*f.bkl=3*delta.ab + // f.akl f.bkl = 3 delta.ab } else if (dummy_indices.size() == 2) { int sign1, sign2; - ex a = permute_free_index_to_front(ex_to_indexed(*self).get_indices(), dummy_indices, sign1); - ex b = permute_free_index_to_front(ex_to_indexed(*other).get_indices(), dummy_indices, sign2); + ex a = permute_free_index_to_front(ex_to(*self).get_indices(), dummy_indices, sign1); + ex b = permute_free_index_to_front(ex_to(*other).get_indices(), dummy_indices, sign2); *self = sign1 * sign2 * 3 * delta_tensor(a, b); - *other = _ex1(); + *other = _ex1; + return true; + } + + } else if (is_ex_exactly_of_type(other->op(0), su3t)) { + + // f.abc T.b T.c = 3/2 I T.a + if (other+1 != v.end() + && is_ex_exactly_of_type(other[1].op(0), su3t) + && ex_to(*self).has_dummy_index_for(other[1].op(1))) { + + exvector self_indices = ex_to(*self).get_indices(); + exvector dummy_indices; + dummy_indices.push_back(other[0].op(1)); + dummy_indices.push_back(other[1].op(1)); + int sig; + ex a = permute_free_index_to_front(self_indices, dummy_indices, sig); + *self = numeric(3, 2) * sig * I; + other[0] = color_T(a, ex_to(other[0]).get_representation_label()); + other[1] = _ex1; return true; } } @@ -428,7 +477,7 @@ ex color_T(const ex & a, unsigned char rl) { if (!is_ex_of_type(a, idx)) throw(std::invalid_argument("indices of color_T must be of type idx")); - if (!ex_to_idx(a).get_dim().is_equal(8)) + if (!ex_to(a).get_dim().is_equal(8)) throw(std::invalid_argument("index dimension for color_T must be 8")); return color(su3t(), a, rl); @@ -438,20 +487,20 @@ ex color_f(const ex & a, const ex & b, const ex & c) { if (!is_ex_of_type(a, idx) || !is_ex_of_type(b, idx) || !is_ex_of_type(c, idx)) throw(std::invalid_argument("indices of color_f must be of type idx")); - if (!ex_to_idx(a).get_dim().is_equal(8) || !ex_to_idx(b).get_dim().is_equal(8) || !ex_to_idx(c).get_dim().is_equal(8)) + if (!ex_to(a).get_dim().is_equal(8) || !ex_to(b).get_dim().is_equal(8) || !ex_to(c).get_dim().is_equal(8)) throw(std::invalid_argument("index dimension for color_f must be 8")); - return indexed(su3f(), indexed::antisymmetric, a, b, c); + return indexed(su3f(), sy_anti(), a, b, c); } ex color_d(const ex & a, const ex & b, const ex & c) { if (!is_ex_of_type(a, idx) || !is_ex_of_type(b, idx) || !is_ex_of_type(c, idx)) throw(std::invalid_argument("indices of color_d must be of type idx")); - if (!ex_to_idx(a).get_dim().is_equal(8) || !ex_to_idx(b).get_dim().is_equal(8) || !ex_to_idx(c).get_dim().is_equal(8)) + if (!ex_to(a).get_dim().is_equal(8) || !ex_to(b).get_dim().is_equal(8) || !ex_to(c).get_dim().is_equal(8)) throw(std::invalid_argument("index dimension for color_d must be 8")); - return indexed(su3d(), indexed::symmetric, a, b, c); + return indexed(su3d(), sy_symm(), a, b, c); } ex color_h(const ex & a, const ex & b, const ex & c) @@ -470,24 +519,16 @@ ex color_trace(const ex & e, unsigned char rl) { if (is_ex_of_type(e, color)) { - if (ex_to_color(e).get_representation_label() == rl + if (ex_to(e).get_representation_label() == rl && is_ex_of_type(e.op(0), su3one)) - return _ex3(); + return _ex3; else - return _ex0(); - - } else if (is_ex_exactly_of_type(e, add)) { - - // Trace of sum = sum of traces - ex sum = _ex0(); - for (unsigned i=0; i 0) { + + // Trace maps to all other container classes (this includes sums) + pointer_to_map_function_1arg fcn(color_trace, rl); + return e.map(fcn); + + } else + return _ex0; } } // namespace GiNaC