On a result of Gábor Czédli concerning congruence lattices of planar semimodular lattices
Grätzer, George
Original · EN
A planar semimodular lattice is slim if it does not contain M₃ as a sublattice. An SPS lattice is a slim, planar, semimodular lattice. A recent result of Gábor Czédli proves that there is an eight element (planar) distributive lattice that cannot be represented as the congruence lattice of an SPS lattice. We provide a new proof.
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