* Implementation of GiNaC's special tensors. */
/*
- * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2007 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
DEFAULT_COMPARE(tensmetric)
DEFAULT_COMPARE(spinmetric)
+bool tensdelta::info(unsigned inf) const
+{
+ if(inf == info_flags::real)
+ return true;
+
+ return false;
+}
+
+bool tensmetric::info(unsigned inf) const
+{
+ if(inf == info_flags::real)
+ return true;
+
+ return false;
+}
+
int minkmetric::compare_same_type(const basic & other) const
{
GINAC_ASSERT(is_a<minkmetric>(other));
return inherited::compare_same_type(other);
}
+bool minkmetric::info(unsigned inf) const
+{
+ if(inf == info_flags::real)
+ return true;
+
+ return false;
+}
+
int tensepsilon::compare_same_type(const basic & other) const
{
GINAC_ASSERT(is_a<tensepsilon>(other));
return inherited::compare_same_type(other);
}
+bool tensepsilon::info(unsigned inf) const
+{
+ if(inf == info_flags::real)
+ return true;
+
+ return false;
+}
+
+bool spinmetric::info(unsigned inf) const
+{
+ if(inf == info_flags::real)
+ return true;
+
+ return false;
+}
+
DEFAULT_PRINT_LATEX(tensdelta, "delta", "\\delta")
DEFAULT_PRINT(tensmetric, "g")
DEFAULT_PRINT_LATEX(minkmetric, "eta", "\\eta")
again:
if (self_idx->is_symbolic()) {
for (size_t i=1; i<other->nops(); i++) {
+ if (! is_a<idx>(other->op(i)))
+ continue;
const idx &other_idx = ex_to<idx>(other->op(i));
if (is_dummy_pair(*self_idx, other_idx)) {
if (!ex_to<idx>(i1).get_dim().is_equal(_ex2))
throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
+ if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0)))
+ return indexed(epsilon, antisymmetric2(), i1, i2).hold();
+
return indexed(epsilon, antisymmetric2(), i1, i2);
}
if (!ex_to<idx>(i1).get_dim().is_equal(_ex3))
throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
+ if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0))||is_a<wildcard>(i3.op(0)))
+ return indexed(epsilon, antisymmetric3(), i1, i2, i3).hold();
+
return indexed(epsilon, antisymmetric3(), i1, i2, i3);
}
if (!ex_to<idx>(i1).get_dim().is_equal(_ex4))
throw(std::runtime_error("index dimension of epsilon tensor must match number of indices"));
+ if(is_a<wildcard>(i1.op(0))||is_a<wildcard>(i2.op(0))||is_a<wildcard>(i3.op(0))||is_a<wildcard>(i4.op(0)))
+ return indexed(pos_sig ? epsilon_pos : epsilon_neg, antisymmetric4(), i1, i2, i3, i4).hold();
+
return indexed(pos_sig ? epsilon_pos : epsilon_neg, antisymmetric4(), i1, i2, i3, i4);
}