after a life of 94 years + 7 months (He was born September 16, 1929).
I met Newton da Costa in January 1991 in Paris and he invited me to work with him in Brazil.
Details of the story can be found here:
(3) PARACONSISTENT LOGIC
My interest for the work of Newton da Costa was initially related to paraconsistent logic:
J.-Y.Béziau, “Adventures in the paraconsistent jungle”, in Handbook of Paraconsistency, College Publications, London, 2007, pp.63-80:
I have been involved in the organization of the World Congresses of Paraconsistency:
The 7th edition will take place in Oaxaca, Mexico, Sept 2-6, 2024:
I am the editor of the Paraconsistent Newsletter.
The first interview is with Newton da Costa:
The latest one with João Marcos:
There is a special issue of the South American Journal of Logic (SAJL, a journal I launched with my colleague Marcelo Coniglio in 2015),
edited by Luis Felipe Bartolo Alegre and José Carlos Cifuentes, dedicated to the Peruvian philosopher Francisco Miró Quesada, a long time friend of Newton da Costa, including his letter proposing the expression "paraconsistent logic", on a request by da Costa.
SAJL Volume 6, Issue 2, December 2020:
This year, in January, I organized, together with Luis Alegre, in Cusco, Peru:
SALOME 1: The 1st South American LOgic MEeting
(4) UNIVERSAL LOGIC
I developed the universal logic project based on my collaboration with Newton da Costa on the theory of valuations, as explained here:
J.-Y.Béziau, “From paraconsistent to universal logic”, Sorites, 12 (2001), pp.5-32.
After spending one year with Newton da Costa in São Paulo 1991-92, I moved with his support to Poland for one year and a half (1992-1993).
This is where I coined the expression "Universal Logic", details here:
The Lvov-Warsaw School : a True Mythology
I defended my PhD "Recherches sur la Logique Universelle" at the Department of Mathematics of the University Denis Diderot Paris in 1995,
after a Fulbright stay at the Department of Mathematics of the University of California, Los Angeles,
and an additional stay with da Newton Costa in São Paulo in 1994 where I wrote my PhD.
After two years at Stanford working with Patrick Suppes, a good friend of Newton da Costa, I moved to Switzerland in 2002.
In 2007 I founded the journal Logica Universalis (Brikhäuser/Springer)
after having organized the 1st UNILOG, World Congress and School on Universal Logic in Montreux, Switzerland, 2005
(5) NEWTON DA COSTA LOGIC PRIZE AND THE WORLD LOGIC PRIZES CONTEST
I launched the Newton da Costa logic prize in September 2014, for his 85th birthday:
https://www.uni-log.org/newton-da-costa-prize.htmlThis led to the creation of logic awards worldwide and the World Logic Prizes Contest.(WLPC).
The first edition took place at the 6th UNILOG in Vichy in 2018, the second at the 7th UNILOG in Crete in 2022:
The third edition will take place at the 8th UNILOG in Cusco, Peru, in December 2025.