8 citations · 18 across the 3 of their papers we have counts for
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math.LO2019★ 7 cited
Epimorphism surjectivity in varieties of Heyting algebras
T. Moraschini, J. J. Wannenburg
It was shown recently that epimorphisms need not be surjective in a variety K of Heyting algebras, but only one counter-example was exhibited in the literature until now. Here, a c…
math.LO2019★ 3 cited
Singly generated quasivarieties and residuated structures
T. Moraschini, J. G. Raftery, J. J. Wannenburg
A quasivariety K of algebras has the joint embedding property (JEP) iff it is generated by a single algebra A. It is structurally complete iff the free countably generated algebra…
math.LO2018★ 8 cited
Epimorphisms, definability and cardinalities
T. Moraschini, J. G. Raftery, J. J. Wannenburg
Generalizing a theorem of Campercholi, we characterize, in syntactic terms, the ranges of epimorphisms in an arbitrary class of similar first-order structures (as opposed to an ele…