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math.CO2026
From orthoposets to orthomodular posets
John Harding, Gejza Jenda, Bert Lindenhovius
We show that the category of orthomodular posets is a full coreflective subcategory of the category of strong orthoposets, those orthoposets in which any two orthogonal elements ha…
math.CO2013
Automorphisms of decompositions
Tim Hannan, John Harding
Harding showed that the direct product decompositions of many different types of structures, such as sets, groups, vector spaces, topological spaces, and relational structures, nat…