An original result about Hilbert Positive Propositional Calculus introduced in [11] is proven. That is, it is shown that the pseudo-canonical formulae of that calculus (and hence also the canonical ones, see [17]) are a subset of the classical tautologies.
@article{bwmeta1.element.doi-10_2478_forma-2014-0011,
author = {Marco B. Caminati and Artur Korni\l owicz},
title = {Pseudo-Canonical Formulae are Classical},
journal = {Formalized Mathematics},
volume = {22},
year = {2014},
pages = {99-103},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_2478_forma-2014-0011}
}
Marco B. Caminati; Artur Korniłowicz. Pseudo-Canonical Formulae are Classical. Formalized Mathematics, Tome 22 (2014) pp. 99-103. http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_2478_forma-2014-0011/
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