is_sso

int syten::MPS::Operator::is_sso {-1}

if > -1, denotes the site of the sso, otherwise, that the tensor is not a single-site operator; if -2 denotes that this is an identity and will take on the SSO-ness of the other operator during multiplication!

Referenced by syten::MPS::Lattice::get(), isIdentity(), isSingleSite(), syten::MPS::Lattice::Lattice(), serialize(), and singleSite().