Results 241 to 250 of about 88,869 (296)

Patient-Centered Leadership and Co-Design of Services for Breast Cancer Program in Nicaragua. [PDF]

open access: yesInt J Environ Res Public Health
Suárez ME   +5 more
europepmc   +1 more source

The proper treatment of variables in predicate logic

open access: closedLinguistics and Philosophy, 2018
In §93 of The Principles of Mathematics, Bertrand Russell (1903) observes that “the variable is a very complicated logical entity, by no means easy to analyze correctly”. This assessment is borne out by the fact that even now we have no fully satisfactory understanding of the role of variables in a compositional semantics for first-order logic.
Kai F Wehmeier
exaly   +3 more sources

Predicate calculus with free quantifier variables

open access: closedJournal of Symbolic Logic, 1969
In the literature of symbolic logic there are many examples of systems having free variables ranging over truth-values, individuals, or predicates. But, though many such systems are equipped with universal and existential quantifiers (and though many other quantifiers, e.g., for exactly one, are thereby definable), the problem of free variables ...
Thomason, Richmond H.   +1 more
openaire   +3 more sources

Elementary Particles, Hidden Variables, And Hidden Predicates

open access: closedSynthese, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Adonai S. Sant’Anna
openaire   +2 more sources

The Monotonous Elimination of Predicate Variables

open access: closedJournal of Logic and Computation, 1994
The author describes an algorithm which, given a sentence \(\Gamma\) involving universally quantified predicate variables, first reduces this sentence to a normal form \(\Gamma^*\) and then, if \(\Gamma^*\) satisfies certain extra restrictions, eliminates the predicate variables of \(\Gamma^*\) to produce a predicate-free equivalent of \(\Gamma\).
Harold Simmons
openaire   +2 more sources

Relational and partial variable sets and basic predicate logic

open access: closedJournal of Symbolic Logic, 1996
AbstractIn this paper we study the logic of relational and partial variable sets, seen as a generalization of set-valued presheaves, allowing transition functions to be arbitrary relations or arbitrary partial functions. We find that such a logic is the usual intuitionistic and co-intuitionistic first order logic without Beck and Frobenius conditions ...
Ghilardi, Silvio, Meloni, Giancarlo
openaire   +2 more sources

Computational improvements in Prolog applications by predicate variable pointers

open access: closedIEEE Transactions on Software Engineering, 1990
The programming tradeoffs between structure-oriented and clause-oriented operations on data structures in Prolog are limited in current implementations because the assertion of clauses that include uninstantiated variables destroys any binding between these variables and those with which they are unified in the execution of the program.
G.M. Karam
openaire   +2 more sources

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