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math.AG2017
Geometric constructibility of polygons lying on a circular arc
Delbrin Ahmed, Gábor Czédli, Eszter K. Horváth
For a positive integer , an -sided polygon lying on a circular arc or, shortly, an -fan is a sequence of points on a circle going counterclockwise such that the "tot…
math.RA2017
Characterizing fully principal congruence representable distributive lattices
Gábor Czédli
Motivated by a recent paper of G. Grätzer, a finite distributive lattice is said to be fully principal congruence representable if for every subset of containing , $…