Submitted:
22 December 2021
Posted:
23 December 2021
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Abstract
We study and describe possibilities for arities of elementary theories and of their expansions. Links for arities with respect to Boolean algebras, to disjoint unions and to compositions of structures are shown. Arities and aritizabilities are semantically characterized. The dynamics for arities of theories is described.
Keywords:
elementary theory
; arity
; expansion
; aritizability
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