cost_function()

SRDef syten::IPEPS::FullUpdate::cost_function	(	Tensor< 4 >	n,
		Tensor< 4 >	gab,
		Tensor< 3 >	a,
		Tensor< 3 >	b
	)

Internal cost function to measure the convergence of the full-update ALS scheme.

References syten::abs(), syten::IPEPS::FullUpdate::cost_function(), syten::sqrt(), and syten::YesNo< struct _prod_conj >::y().

Referenced by syten::IPEPS::FullUpdate::apply_op(), and syten::IPEPS::FullUpdate::cost_function().

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