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 welcomed. 

Send a one page abstract by May 8, 2024 to square2024@protonmail.com 

 Extended Deadline: August 9, 2024  

After the congress, a selection of full papers will be published in the journal Logica Universalis  and in a book of the series Studies in Universal Logic.

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

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