Studia humana (SH) is a multi-disciplinary peer reviewed journal publishing valuable
contributions on any aspect of human sciences such as...
read more...
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.
Departing from basic concepts in abstract logics, this paper introduces two
concepts: conjunctive and disjunctive limits. These notions are used to
formalize levels of modal operators.