Geodesic
Orthomodular lattices with almost orthogonal sets of atoms
Commentationes Mathematicae Universitatis Carolinae, Tome 32 (1991) no. 3, pp. 423-429

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The set $A$ of all atoms of an atomic orthomodular lattice is said to be almost ortho\-go\-nal if the set $\{b\in A:b\nleq a'\}$ is finite for every $a\in A$. It is said to be strongly almost ortho\-go\-nal if, for every $a\in A$, any sequence $b_1, b_2,\dots $ of atoms such that $a\nleq b'_1, b_1 \nleq b'_2, \dots $ contains at most finitely many distinct elements. We study the relation and consequences of these notions. We show among others that a complete atomic orthomodular lattice is a compact topological one if and only if the set of all its atoms is almost ortho\-go\-nal.
Classification : 03G12, 06C15
Keywords: atomic orthomodular lattice; topological orthomodular lattice; almost orthogonal sets of atoms 
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     author = {Pulmannov\'a, Sylvia and Rogalewicz, Vladim{\'\i}r},
     title = {Orthomodular lattices with almost orthogonal sets of atoms},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {423--429},
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     number = {3},
     year = {1991},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1991__32_3_a2/}
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Pulmannová, Sylvia; Rogalewicz, Vladimír. Orthomodular lattices with almost orthogonal sets of atoms. Commentationes Mathematicae Universitatis Carolinae, Tome 32 (1991) no. 3, pp. 423-429. http://geodesic.mathdoc.fr/item/CMUC_1991__32_3_a2/