combine_bases()

SBasis syten::STensorImpl::combine_bases	(	SBasis const &	a,
		SBasis const &	b
	)

Returns a combined basis constructed from bases a and b as it occurs during a subspace expansion, something akin to a + b.

Each sector of the new bases will have the size of the sum of the repective sectors in a and b respectively and the total dimension of the new bases is the sum of the total dimensions of the input bases. The function is asymmetric, combine_bases(a, b) generates different IDs than combine_bases(b, a).

References syten::STensorImpl::SBasis::add(), syten::STensorImpl::SBasis::dir(), syten::STensorImpl::SBasis::get_ids(), syten::STensorImpl::SBasis::get_prlvl(), syten::STensorImpl::SBasis::hasSymmetry(), syten::STensorImpl::SBasis::name(), syten::STensorImpl::SBasis::prime(), syten::STensorImpl::SBasis::rename(), syten::STensorImpl::SBasis::set_dir(), syten::STensorImpl::SBasis::set_ids(), and SYTEN_ASSERT_MSG.

Referenced by expand(), syten::Pyten::init_stensor(), and zero_expand().

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