Displaying similar documents to “Nearly disjoint sequences in convergence l -groups”

Disjoint sequences in Boolean algebras

Ján Jakubík (1998)

Mathematica Bohemica

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We deal with the system Conv B of all sequential convergences on a Boolean algebra B . We prove that if α is a sequential convergence on B which is generated by a set of disjoint sequences and if β is any element of Conv B , then the join α β exists in the partially ordered set Conv B . Further we show that each interval of Conv B is a Brouwerian lattice.

Direct product decompositions of infinitely distributive lattices

Ján Jakubík (2000)

Mathematica Bohemica

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Let α be an infinite cardinal. Let 𝒯 α be the class of all lattices which are conditionally α -complete and infinitely distributive. We denote by 𝒯 σ ' the class of all lattices X such that X is infinitely distributive, σ -complete and has the least element. In this paper we deal with direct factors of lattices belonging to 𝒯 α . As an application, we prove a result of Cantor-Bernstein type for lattices belonging to the class 𝒯 σ ' .

Convergence l -groups with zero radical

Ján Jakubík (1997)

Mathematica Bohemica

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In this paper we investigate abelian convergence -groups with zero radical such that each bounded sequence has a convergent subsequence.