
doi: 10.1007/bf01647635
In ''A formal system of negationless arithmetic that is consistent with respect to Heyting arithmetic'' [Mat. Zametki 36, No.4, 583-592 (1984; Zbl 0576.03037)] the author shows that Heyting arithmetic is a conservative extension of \(HA^ N\)- a system of negationless arithmetic, under certain interpretation. Here he extends this result to the case of intuitionistic type theory HATT and a system of negationless type theory HATTN.
Heyting arithmetic, negationless type theory, intuitionistic type theory, Intuitionistic mathematics, Relative consistency and interpretations
Heyting arithmetic, negationless type theory, intuitionistic type theory, Intuitionistic mathematics, Relative consistency and interpretations
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