06F05 20M50 2 Morita context 2 Morita equivalence for pomonoids 2 Morita invariant 2 Po-\(\Gamma\)-semigroup 2 bi-ideal elements 2 duo; intra-regular 2 lattice-ordered semigroup 2 locally testable 2 maximal ideal 2 normal band 2 prime ideal in ordered semigroups 2 regular 2 17A30 1 20M30 1 43A65 1 \(S\)-posets 1 binary relation 1 doppelsemigroup 1 flat 1 ordered doppelsemigroup 1 pomonoids 1 projective 1 regular torsionless 1 representation 1 semigroup 1