Geodesic
Hypersubstitutions in orthomodular lattices
Discussiones Mathematicae. General Algebra and Applications, Tome 21 (2001) no. 1, pp. 83-92.

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It is shown that in the variety of orthomodular lattices every hypersubstitution respecting all absorption laws either leaves the lattice operations unchanged or interchanges join and meet. Further, in a variety of lattices with an involutory antiautomorphism a semigroup generated by three involutory hypersubstitutions is described.
Keywords: hypersubstitution, proper hypersubstitution, orthomodular lattice, absorption algebra 
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Chajda, Ivan; Länger, Helmut. Hypersubstitutions in orthomodular lattices. Discussiones Mathematicae. General Algebra and Applications, Tome 21 (2001) no. 1, pp. 83-92. http://geodesic.mathdoc.fr/item/DMGAA_2001_21_1_a7/

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