Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on regular De Morgan semi-Heyting algebras   The purpose of this note is two-fold. Firstly, we prove that the variety
RDMSH1 of regular De Morgan semi-Heyting algebras of level 1 satisfies Stone
identity and present (equational) axiomatizations for several subvarieties of
RDMSH1. Secondly, we give a concrete description of the lattice of subvarieties
of the variety RDQDStSH1 of regular dually quasi-De Morgan Stone semi-Heyting
algebras that contains RDMSH1 . Furthermore, we prove that every subvariety of
RDQDStSH1, and hence of RDMSH1, has Amalgamation Property. The note concludes
with some open problems for further investigation.

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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg