- z -

• zero() : libsemigroups::BooleanSemiring , libsemigroups::Integers , libsemigroups::MaxPlusSemiring , libsemigroups::MinPlusSemiring , libsemigroups::NaturalSemiring , libsemigroups::Semiring< T > , libsemigroups::TropicalMaxPlusSemiring , libsemigroups::TropicalMinPlusSemiring