2 papers
math.RA2022
Lattices with lots of congruence energy
Gábor Czédli
In 1978, motivated by E. Hückel's work in quantum chemistry, I. Gutman introduced the concept of the energy of a finite simple graph as the sum of the absolute values of the ei…
math.RA2022
2-distributivity and lattices of sublattices closed under taking relative complements
Gábor Czédli
For a modular lattice of finite length, we prove that the distributivity of is a sufficient condition while its 2-distributivity is a necessary condition that those sublatt…