Remarks on Heyting algebras with tense operators
Aldo Victorio Figallo, Gustavo Pelaitay · 2012
The concept of tense operators on Heyting algebras was introduced in [3]. The aim of this paper is to prove, that the set of axioms proposed by I. Chajda in [3, Definition 1], is a dependent axioms system and show that tense operators F and P can not be regarded as existential quantifiers.