dropUnmatchedM()

bool syten::MPS::LBOState::dropUnmatchedM	(	Index const	site,
		bool const	left = true,
		bool const	right = true,
		bool const	up = true
	)

Compares the blocks of the rank-3 MPS tensor on the specified site against its neighbouring tensors (if the relevant boolean is true) and removes them if no corresponding quantum number sector exists there.

Returns

true if a block was removed, false otherwise.

References dIdx, syten::Tensor< rank >::getBasisMap(), syten::BasisMap::hasSymmetry(), lIdx, syten::MPS::LBOState::Local::M, m(), maybeCache(), std::move(), rIdx, size(), syten::Tensor< rank >::size(), uIdx, syten::MPS::LBOState::Local::V, and v().

Referenced by dropUnmatched(), syten::MPS::expand_to_left_lbo(), syten::MPS::expand_to_right_lbo(), syten::MPS::expand_to_top(), leftnormM(), physnormM(), physnormV(), and rightnormM().

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