How Many “Times” Do We Have in Quantum Gravity?
نویسندگان
چکیده
منابع مشابه
How many times do we need and assumption ?
In this article we present a class of formulas φn, n ∈ Nat, that need at least 2 assumptions to be proved in a normal proof in Natural Deduction for purely implicational minimal propositional logic. In purely implicational classical propositional logic, with Peirce’s rule, each φn is proved with only one assumption in Natural Deduction in a normal proof. Hence, the formulas φn have exponentiall...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1990
ISSN: 0033-068X
DOI: 10.1143/ptp.84.1108