Results 101 to 110 of about 10,642 (232)

Hypercontact semilattices

open access: yesJournal of Applied Non-Classical Logics
Contact Boolean algebras are one of the main algebraic tools in region-based theory of space. T. Ivanova provided strong motivations for the study of merely semilattices with a contact relation. Another significant motivation for considering an even weaker underlying structure comes from event structures with binary conflict in the theory of concurrent
openaire   +2 more sources

Congruence lattices of free lattices in non-distributive varieties

open access: yes, 2005
We prove that for any free lattice F with at least $\aleph\_2$ generators in any non-distributive variety of lattices, there exists no sectionally complemented lattice L with congruence lattice isomorphic to the one of F.
Ploscica, Miroslav   +2 more
core  

Urban Form and Community Structure: Comparing Tree and Semilattice Neighbourhoods for Sustainable Development in Jerusalem

open access: yesLand
Cities are complex land systems where spatial form mediates welfare, connectivity, and community-based adaptation. This study compares two Haredi neighbourhoods in Jerusalem, Ezrat Torah (an organically evolved semilattice) and Ramat Shlomo (a planned ...
Shlomit Flint Ashery
doaj   +1 more source

The Median Procedure in the Semilattice of Orders

open access: yesDiscrete Applied Mathematics, 2003
Let X be a finite set; we are concerned with the problem of finding a consensus order P that summarizes an m-tuple (profile) P* of (partial) orders on X. A classical approach is to consider a distance function d on the set O of all the orders of X and to
B. Leclerc
semanticscholar   +1 more source

A topological lattice on the set of multifunctions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1989
Let X be a Wilker space and M(X,Y) the set of continuous multifunctions from X to a topological space Y equipped with the compact-open topology. Assuming that M(X,Y) is equipped with the partial order ⊂ we prove that (M(X,Y),⊂) is a topological V ...
Basil K. Papadopoulos
doaj   +1 more source

Identities in implicative semilattices [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
An effective procedure is given for deciding whether or not an equation in the theory of implicative semilattices is an identity.
openaire   +2 more sources

Lattice of closure endomorphisms of a Hilbert algebra

open access: yes, 2017
A closure endomorphism of a Hilbert algebra A is a mapping that is simultaneously an endomorphism of and a closure operator on A. It is known that the set CE of all closure endomorphisms of A is a distributive lattice where the meet of two elements is ...
Cīrulis, Jānis
core  

Home - About - Disclaimer - Privacy