truncate()

SRDef syten::MPS::State::truncate	(	Truncation const &	trunc = Truncation(),
		State::DropNorm const	dropN = DropNorm::Yes,
		bool const	sweep_left = true
	)

Truncates the state.

First drops all unmatched blocks, then left-normalises the state without truncation and finally right-normalises with the given truncation.

Parameters

trunc	Truncation specification
dropN	If true, drop the norm on both normalisation sweeps.
sweep_left	Whether the truncation sweep is left. Resulting state is rightnormed(true) or leftnormed(false).

Returns

the total incurred error during truncations

References dropUnmatched(), leftnorm(), and rightnorm().

Referenced by syten::MPS::RandomState::generateCompleteState(), syten::MPS::RandomState::generateSampledState(), syten::Pyten::init_mps(), and truncateKeepNorm().

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