Subdirekte Produkte vollständiger Verbände.
Subfields of lattice-ordered fields that mimic maximal totally ordered subfields
Subgraph isomorphism in planar graphs and related problems.
Subgroups and hulls of Specker lattice-ordered groups
In this article, it will be shown that every -subgroup of a Specker -group has singular elements and that the class of -groups that are -subgroups of Specker -group form a torsion class. Methods of adjoining units and bases to Specker -groups are then studied with respect to the generalized Boolean algebra of singular elements, as is the strongly projectable hull of a Specker -group.
Sublattices of Euclidean spaces.
Sublattices of topologically represented lattices.
Sublattices with saturated chains
Sublocale sets and sublocale lattices
We present very short and simple proofs of such facts as co-frame distributivity of sublocales, zero-dimensionality of the resulting co-frames, Isbell’s Density Theorem and characteristic properties of fit and subfit frames, using sublocale sets.
Submeasures and Locally Solid Topologies on Riesz Spaces.
Subspaces in abstract Stone duality.
Subtraction algebras and -algebras
In this note we show that a subtraction algebra is equivalent to an implicative -algebra, and a subtraction semigroup is a special case of a -semigroup.
Subtraction semigroups
A subtraction semigroup is a semigroup with a further operation "" added, called subtraction and satisfying certain axioms. The paper concerns a problem by B. M. Schein concerning the structure of multiplication in a subtraction semigroup.
Sui gruppi e corpi ordinati
Summen n-ter Potenzen in Körpern.
Summer session on ordered sets at Cikháj
Sunflowers in lattices.
Super-De Morgan functions and free De Morgan quasilattices
A De Morgan quasilattice is an algebra satisfying hyperidentities of the variety of De Morgan algebras (lattices). In this paper we give a functional representation of the free n-generated De Morgan quasilattice with two binary and one unary operations. Namely, we define the concept of super-De Morgan function and prove that the free De Morgan quasilattice with two binary and one unary operations on nfree generators is isomorphic to the De Morgan quasilattice of super-De Morgan functions of nvariables....
Suprema of Classes of Generalized Scrimger Varieties of Lattice Ordered Groups.
Supremum properties of Galois-type connections
In a former paper, motivated by a recent theory of relators (families of relations), we have investigated increasingly regular and normal functions of one preordered set into another instead of Galois connections and residuated mappings of partially ordered sets. A function of one preordered set into another has been called (1) increasingly -normal, for some function of into , if for any and we have if and only if ; (2) increasingly -regular, for some function of into itself,...
Sur des conjectures de R. Fraisse