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  1.  5
    Mr2729665 (2012b: 68075) 68q05.Edwin J. Beggs, José Félix Costa & John V. Tucker - 2010 - Studia Logica 95 (1-2):279-300.
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  2.  3
    Three Forms of Physical Measurement and Their Computability.Edwin Beggs, José Félix Costa & John V. Tucker - 2014 - Review of Symbolic Logic 7 (4):618-646.
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    A Foundation for Real Recursive Function Theory.José Félix Costa, Bruno Loff & Jerzy Mycka - 2009 - Annals of Pure and Applied Logic 160 (3):255-288.
    The class of recursive functions over the reals, denoted by , was introduced by Cristopher Moore in his seminal paper written in 1995. Since then many subsequent investigations brought new results: the class was put in relation with the class of functions generated by the General Purpose Analogue Computer of Claude Shannon; classical digital computation was embedded in several ways into the new model of computation; restrictions of were proved to represent different classes of recursive functions, e.g., recursive, primitive recursive (...)
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  4. Solving Smullyan Puzzles with Formal Systems.José Félix Costa & Diogo Poças - forthcoming - Axiomathes:1-19.
    Solving numeric, logic and language puzzles and paradoxes is common within a wide community of high school and university students, fact witnessed by the increasing number of books published by mathematicians such as Martin Gardner, Douglas Hofstadter [in one of the best popular science books on paradoxes ], inspired by Gödel’s incompleteness theorems), Patrick Hughes and George Brecht and Raymond M. Smullyan, inter alia. Books by Smullyan are, however, much more involved, since they introduce learning trajectories and strategies across several (...)
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