qr_to_back_r()

std::tuple< Tensor< 5 >, Tensor< 3 > > syten::IPEPS::qr_to_back_r	(	Tensor< 5 >	in,
		Tensor< 3 >	rem
	)

Given an IPEPS state tensor at position [0,-1] and the remover tensor between sites [0,-1] and [0,0], folds the remover into the auxiliary state tensor and returns a rank-3 tensor living on the edge between the remover and [0,0] tensor with the physical leg from the [0,-1] tensor.

Use this function instead of qr_to_back() if there is a remover tensor on the link in question.

References syten::Tensor< rank >::b(), syten::Basis::f(), syten::gM(), syten::insertSwap(), std::move(), and syten::QR::qr().

Referenced by syten::IPEPS::FullUpdate::vertical().

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