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math.RA2023
Planar, infinite, semidistributive lattices
George Grätzer, J. B. Nation
An FN lattice is a simple, infinite, semidistributive lattice. Its existence was recently proved by R. Freese and J.\,B. Nation. Let denote the Boolean lattice w…
math.RA2023
An open problem on congruences of finite lattices
George Grätzer
Let be a planar semimodular lattice. We call \emph{slim}, if it has no $\mthree$ sublattice. Let us define an \emph{SPS lattice} as a slim, planar, semimodular lattice .…