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Alexandre Costa-Leite is a logician and philosopher
at the University of Brasilia, where he teaches Logic and
Philosophy. His main interests are in the domains of
non-classical logics and metaphysics.
Edelcio G. de Souza is professor of Logic at the University of São Paulo. He is
interested in abstract logic, model theory and category theory.
This paper analyzes the problem of implication and attempts to
characterize conditionals by a criterion of adequacy. A definition of implication
based on the notion of limit of an infinite sequence is proposed.