G Czédli, G Grätzer - Lattice Theory: Special Topics and Applications …, 2014 - Springer
While the study of planar lattices goes back to the 1970s (KA Baker, PC Fishburn, and FS Roberts [20] and D. Kelly and I. Rival [223]), a systematic study of planar semimodular …
M Wild - Quaestiones Mathematicae, 2000 - Taylor & Francis
Each finite closure system, whence each finite lattice, can be described in terms of" implicational bases"(called" covers of functional dependencies" in relational database …
G Czédli, ET Schmidt - Advances in Mathematics, 2010 - Elsevier
Extending former results by G. Grätzer and EW Kiss (1986)[5] and M. Wild (1993)[9] on finite (upper) semimodular lattices, we prove that each semimodular lattice L of finite length has a …
G Czédli - arXiv preprint arXiv:2107.10202, 2021 - arxiv.org
In 1980, U. Faigle introduced a sort of finite geometries on posets that are in bijective correspondence with finite semimodular lattices. His result has almost been forgotten in …
It is not known which finite graphs occur as induced subgraphs of a hypercube. This is relevant in the theory of parallel computing. The ordered version of the problem is: Which …
G Czédli - Acta Scientiarum Mathematicarum, 2024 - Springer
In 2008, László Zádori proved that the lattice S ub (V) of all subspaces of a vector space V of finite dimension at least 3 over a finite field F has a 5-element generating set; in other words …
A lattice is said to be finite height generated if it is complete and every element is the join of some elements of finite height. Extending former results by Grätzer and Kiss (Order 2: 351 …
Some recent results on semimodular lattices are surveyed, and some related results are given. The topics include a strong form of the Jordan-Hölder theorem, the semimodularity of …