GiNaC::tensmetric Class Reference

This class represents a general metric tensor which can be used to raise/lower indices. More...

#include <tensor.h>

Inheritance diagram for GiNaC::tensmetric:

List of all members.

Public Member Functions
bool	info (unsigned inf) const
	Information about the object.
ex	eval_indexed (const basic &i) const
	Automatic symbolic evaluation of an indexed metric tensor.
bool	contract_with (exvector::iterator self, exvector::iterator other, exvector &v) const
	Contraction of an indexed metric tensor with something else.
Protected Member Functions
unsigned	return_type () const
void	do_print (const print_context &c, unsigned level) const
	Default output to stream.

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Detailed Description

This class represents a general metric tensor which can be used to raise/lower indices.

If indexed, it must have exactly two indices of the same type which must be of class varidx or a subclass.

Definition at line 75 of file tensor.h.

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Member Function Documentation

bool GiNaC::tensmetric::info

(

unsigned

inf

)

const [virtual]

Information about the object.

See also:

class info_flags

Reimplemented from GiNaC::basic.

Reimplemented in GiNaC::spinmetric, and GiNaC::minkmetric.

Definition at line 148 of file tensor.cpp.

References GiNaC::info_flags::real.

ex GiNaC::tensmetric::eval_indexed

(

const basic &

i

)

const [virtual]

Automatic symbolic evaluation of an indexed metric tensor.

Reimplemented from GiNaC::basic.

Reimplemented in GiNaC::spinmetric, and GiNaC::minkmetric.

Definition at line 253 of file tensor.cpp.

References GiNaC::delta_tensor(), GiNaC::idx::get_dim(), GINAC_ASSERT, GiNaC::basic::hold(), GiNaC::varidx::is_covariant(), GiNaC::ex::is_equal(), m, GiNaC::idx::minimal_dim(), GiNaC::subs_options::no_pattern, GiNaC::basic::nops(), GiNaC::basic::op(), GiNaC::idx::replace_dim(), and GiNaC::basic::subs().

bool GiNaC::tensmetric::contract_with	(	exvector::iterator	self,
		exvector::iterator	other,
		exvector &	v
	)		const [virtual]

Contraction of an indexed metric tensor with something else.

Reimplemented from GiNaC::basic.

Reimplemented in GiNaC::spinmetric.

Definition at line 444 of file tensor.cpp.

References GINAC_ASSERT, and GiNaC::tensor::replace_contr_index().

unsigned GiNaC::tensmetric::return_type

(

)

const [inline, protected, virtual]

Reimplemented from GiNaC::tensor.

Reimplemented in GiNaC::minkmetric.

Definition at line 87 of file tensor.h.

References GiNaC::return_types::commutative.

void GiNaC::tensmetric::do_print	(	const print_context &	c,
		unsigned	level
	)		const [protected]

Default output to stream.

Reimplemented from GiNaC::basic.

Reimplemented in GiNaC::spinmetric, and GiNaC::minkmetric.

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The documentation for this class was generated from the following files:

• tensor.h
• tensor.cpp