Now showing items 1-2 of 2

  • D-semigroups and constellations

    Stokes, Tim E. (Springer, 2017)
    In a result generalising the Ehresmann–Schein–Nambooripad Theorem relating inverse semigroups to inductive groupoids, Lawson has shown that Ehresmann semigroups correspond to certain types of ordered (small) categories he ...
  • Generalised domain and E-inverse semigroups

    Stokes, Tim E. (Springer, 2018)
    A generalised D-semigroup is here defined to be a left E-semiabundant semigroup S in which the \overline{\mathcal R}_E-class of every x\in S contains a unique element D(x) of E, made into a unary semigroup. Two-sided ...