
In Algebra Univers. 35, 63-71 (1996; Zbl 0842.06003), \textit{S. Lavanya} and \textit{S. Parameshwara Bhatta} considered a partial ordering on the set \(\text{CS}(L)\) of all the convex sublattices of a lattice \(L\), namely \(A\leq B\) if and only if \((A]\subseteq (B]\) and \([A)\supseteq [B)\), and begun a corresponding study. The present paper continues this study. We list here some of the results: Theorem 1. This ordering is the smallest ordering on \(\text{CS}(L)\) extending the usual ordering on \(I(L)\) (ideals) and \(D(L)\) (filters) and satisfying an additional necessary condition (named (G)). Theorem 4. \(\text{CS}(L)\) is semimodular if \(I(L)\) and \(D(L)\) are semimodular; if \(L\) is of finite length then the converse also holds. Theorem 11. Let \(L\) be \ complete lattice. Then \(L\) is pseudocomplemented if and only if CS\((L)\) is pseudocomplemented. Reviewer's remark: In the above-mentioned paper, the equivalence in Theorem 11 was proved only for upper continuous lattices.
Pseudocomplemented lattices, convex sublattices, Structure theory of lattices, Semimodular lattices, geometric lattices
Pseudocomplemented lattices, convex sublattices, Structure theory of lattices, Semimodular lattices, geometric lattices
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