On a property of congruence lattices of slim, planar, semimodular lattices
Abstract
In a 2121 paper with G\'abor Cz\'edli, we introduced and verified the Three-pendant Three-crown Property, 3P3C, for congruence lattices of slim, planar, semimodular lattices. The proof is very long; in part, because it relies on Cz\'edli's 2021 paper on lamps. This paper verifies 3P3C using the Swing Lemma, an elementary and short approach.
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