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Master's Dissertation
DOI
https://doi.org/10.11606/D.8.2012.tde-11042013-104549
Document
Author
Full name
Pedro Alonso Amaral Falcão
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Silva, Rodrigo Bacellar da Costa e (President)
Freire, Rodrigo de Alvarenga
Loparic, Andrea Maria Altino de Campos
Title in Portuguese
Aspectos da teoria de funções modais
Keywords in Portuguese
Completude funcional
Funções modais
Lógica proposicional modal (S5)
Abstract in Portuguese
Apresentamos alguns aspectos da teoria de funções modais, que é o correlato modal da teoria de funções de verdade. Enquanto as fórmulas da lógica proposicional clássica expressam funções de verdade, as fórmulas da lógica proposicional modal (S5) expressam funções modais. Generalizamos alguns dos teoremas da teoria de funções de verdade para o caso modal; em particular, exibimos provas da completude funcional de alguns conjuntos de funções modais e definimos uma (nova) noção de reduto vero-funcional de funções modais, bem como a composição de funções modais em termos destes redutos.
Title in English
Aspects of the theory of modal functions
Keywords in English
Functional completeness
Modal functions
Modal propositional logic (S5)
Abstract in English
We present some aspects of the theory of modal functions, which is the modal correlate of the theory of truth-functions. While the formulas of classical propositional logic express truth-functions, the formulas of modal propositional logic (S5) express modal functions. We generalize some theorems of the theory of truth-functions to the modal case; in particular, we show the functional completeness of some sets of modal functions and define a (new) notion of truth-functional reduct of modal functions, as well as the composition of modal functions in terms of such reducts.
 
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Publishing Date
2013-04-11
 
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