A modal sequent calculus for a fragment
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G. Sambin; S. Valentini
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Article
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1980
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Springer Netherlands
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English
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Global properties of canonical derivability predicates (the standard example is Pr( ) in Peano Arithmetic) are studied here by means of a suitable propositional modal logic GL. i whole book [1] has appeared on GIL and we refer to it for more information and a bibliography on GL. Here we propose a se