To submit a contribution send a one page abstract before September 24 2018 to: kreta2018@square-of-opposition.org. All talks related to the square of opposition are welcomed, in particular those falling under the categories below. Diagrammatic and Artistic works related to the square of opposition are also welcome.

HISTORY OF THE SQUARE
Aristotle, Apuleius, Boethius
Avicennes, oppositions in Arabic thought
Oppositions in Indian and Chinese thoughts
Buridan, Port Royal, Leibniz
Vasiliev, Hamilton, Schröder, Frege
Sesmat, Blanché
Piaget, Lacan, Greimas

APPLICATIONS OF THE SQUARE
proof theory, model theory
debates and politics
psychoanalysis
music and arts
religion, theology
ethics and law
perception and cognition

VARIATIONS OF THE SQUARE
squares of quantification
alethic, deontic, doxatic modal squares
semiotic squares
metalogical squares
paraconsistent and paracomplete squares
intuitionistic and linear squares

EXTENSIONS OF THE SQUARE
cubes
hexagons and stars
octagons and decagons
polyhedra and polysimplexes
n-opposition theory
borromeans