20 citations · 41 across the 14 of their papers we have counts for
6 papers · 1 filter
Medians are below joins in semimodular lattices of breadth 2
Gábor Czédli, Robert C. Powers, Jeremy M. White
Let be a lattice of finite length and let denote the minimum path length metric on the covering graph of . For any , an element belonging t…
Permuting 2-uniform tolerances on lattices
Gábor Czédli
A -uniform tolerance on a lattice is a compatible tolerance relation such that all of its blocks are 2-element. We characterize permuting pairs of 2-uniform tolerances on lattic…
Doubling tolerances and coalition lattices
Gábor Czédli
If every block of a (compatible) tolerance (relation) on a modular lattice of finite length consists of at most two elements, then we call a \emph{doubling tolerance} o…
Planar semilattices and nearlattices with eighty-three subnearlattices
Gábor Czédli
Finite (upper) nearlattices are essentially the same mathematical entities as finite semilattices, finite commutative idempotent semigroups, finite join-enriched meet semilattices,…
One hundred twenty-seven subsemilattices and planarity
Gábor Czédli
Let be a finite -element semilattice. We prove that if has at least subsemilattices, then is planar. For , this result is sharp since there i…
Eighty-three sublattices and planarity
Gábor Czédli
Let be a finite -element lattice. We prove that if has at least sublattices, then is planar. For , this result is sharp since there is a non-p…