Results 21 to 30 of about 203 (52)
Lifting retracted diagrams with respect to projectable functors
, 2004 We prove a general categorical theorem that enables us to state that under certain conditions, the range of a functor is large. As an application, we prove various results of which the following is a prototype: If every diagram, indexed by a lattice, of ...
Wehrung, Friedrich
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A uniform refinement property for congruence lattices
, 2005 The Congruence Lattice Problem asks whether every algebraic distributive lattice is isomorphic to the congruence lattice of a lattice. It was hoped that a positive solution would follow from E. T. Schmidt's construction or from the approach of P. Pudlak,
Wehrung, Friedrich
core
The uniform face ideals of a simplicial complex [PDF]
, 2013 We define the uniform face ideal of a simplicial complex with respect to an ordered proper vertex colouring of the complex. This ideal is a monomial ideal which is generally not squarefree.
Cook II, David
core
The t-median function on graphs [PDF]
, 2005 A median of a sequence pi = x1, x2, … , xk of elements of a finite metric space (X, d ) is an element x for which ∑ k, i=1 d(x, xi) is minimum. The function M with domain the set of all finite sequences on X and defined by M(pi) = {x: x is a median of ...
McMorris, F.R. +2 more
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On lattices and their ideal lattices, and posets and their ideal posets
, 2008 For P a poset or lattice, let Id(P) denote the poset, respectively, lattice, of upward directed downsets in P, including the empty set, and let id(P)=Id(P)-\{\emptyset\}.
Bergman, George M.
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Non-extendability of semilattice-valued measures on partially ordered sets
, 2005 For a distributive join-semilattice S with zero, a S-valued poset measure on a poset P is a map m:PxP->S such that m(x,z)
Wehrung, Friedrich
core +1 more source
Polyhedral products over finite posets
, 2019 Polyhedral products were defined by Bahri, Bendersky, Cohen and Gitler, to be spaces obtained as unions of certain product spaces indexed by the simplices of an abstract simplicial complex.
Kishimoto, Daisuke, Levi, Ran
core
Relatively pseudocomplemented Hilbert algebras
Open Mathematics, 2008 Cīrulis Jānis
doaj +1 more source
Representation of Hilbert algebras and implicative semilattices
Open Mathematics, 2003 Celani Sergio
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