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Currently displaying 1 – 5 of 5

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Independence number and minimum degree for the existence of $(g, f, n)$ -critical graphs.

Zhou, Sizhong; Pan, Quanru; Xu, Yang — 2011

Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică

Intersection preserving and global expansions of subalgebras and filters in lattice implication algebras.

Jun, Young Bae; Xu, Yang; Qin, Keyun — 2006

Bulletin of the Malaysian Mathematical Sciences Society. Second Series

Roughness of Filters in Lattice Implication Algebras

Y. B. Jun; Yang Xu — 2004

Bulletin of the Polish Academy of Sciences. Mathematics

As a generalization of filters in lattice implication algebras, the notion of rough filters in lattice implication algebras is introduced, and some of their properties are considered.

Lexicographic product of extendable graphs.

Bai, Bing; Wu, Zefang; Yang, Xu; Yu, Qinglin — 2010

Bulletin of the Malaysian Mathematical Sciences Society. Second Series

Ultra $L I$ -ideals in lattice implication algebras

Ke Yun Qin; Yang Xu; Young Bae Jun — 2002

Czechoslovak Mathematical Journal

We define an ultra $L I$ -ideal of a lattice implication algebra and give equivalent conditions for an $L I$ -ideal to be ultra. We show that every subset of a lattice implication algebra which has the finite additive property can be extended to an ultra $L I$ -ideal.

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