3 citations · 3 across the 3 of their papers we have counts for
3 papers
math.CO2016★ 3 cited
A note and a short survey on supporting lines of compact convex sets in the plane
Gábor Czédli, László L. Stachó
After surveying some known properties of compact convex sets in the plane, we give a two rigorous proofs of the general feeling that supporting lines can be slide-turned slowly and…
math.CO2016
Swing lattice game and a short proof of the swing lemma for planar semimodular lattices
Gábor Czédli, Géza Makay
The swing lemma, due to G. Grätzer for slim semimodular lattices and extended by G. Czédli and G. Grätzer for all planar semimodular lattices, describes the congruence generated by…
math.RA2014
Diagrams and rectangular extensions of planar semimodular lattices
Gábor Czédli
In 2009, G. Grätzer and E. Knapp proved that every planar semimodular lattice has a rectangular extension. We prove that, under reasonable additional conditions, this extension is…