Programme of the 14th Days of Weak Arithmetics

St.Petersburg, Russia

May 22-24, 1997


Thursday, May 22.

9:00 - 9:30 Registration
9:30 - 9:45 Opening of the meeting
9:45 - 10:30 Patrick Cegielski,
Serge Grigorieff
and Denis Richard
(France)
"On elementary theories of natural numbers equipped with Cantor pairing function"
10:30 - 11:00 Maxim Vsemirnov
(Russia)
"On n-tupling polynomials of small degrees"
11:00 - 11:15 Coffee-break
11:15 - 12:00 Ivan Korec
(Slovakia)
"Arithmetical operations strongest with respect to the first order definability"
12:00 - 12:30 Zofia Adamowicz
(Poland)
"On Tableau consistency in weak theories"
13:00 - 14:00 Lunch
14:30 - 15:15 Jean-Yves Marion
(France) and D.Leviant (USA)
"Predicative Functionals and Poly-space"
15:15 - 15:45 Anatoly Beltiukov
(Russia)
"Theories with subrecursively realizable theorems"
15:45 - 16:00 Coffee-break
16:00 - 16:30 Anatoly Beltiukov
(Russia)
"New results in initial subrecursive classes"
16:30 - 17:15 Henri Alex Esbelin,
(France)
"New closure property of the counting of rudimentary relations and the Grzegorcyk Hierarchy"

Friday, May 23.

9:45 - 10:30 Arnaud Maes
(Belgium)
"Morphisms and Almost-Periodicity"
10:30 - 10:45 Coffee-break
10:45 - 11:30 Marcel Guillaume
(France)
"Simplified models establishing some of Nezondet's results on the Erdos-Woods conjecture and related statements".
11:30 - 12:00 Konstantin Verchinine
(France) and Volodimir Rudenko
(Ukraine)
"Two proof methods for two three-valued modal logics"
12:00 - 12:15 Coffee-break
12:15 - 13:00 Lev Beklemishev
(Russia)
"On parameter-free induction schemata"
13:00 - 13:30 Jacques Duparc
(France)
"Computer science and the fine structure of Borel sets"
14:00 - 15:00 Lunch
15:30 - 19:30 Guided (in English) bus excursion around the city
20:00 - ..... Meeting's party

Saturday, May 24.

10:00 - 10:45 Nikolai Kossovski and Artem Tishkov
(Russia)
"Weak theory of linear inequalities with integer coefficients and variables"
10:45 - 11:00 Coffee-break
11:00 - 11:45 Alexis Bes
(France)
"On results of Michaux and Villemaire"
11:45 - 12:30 Roger Espel Llima
(France)
"One can count modulo n within the structure (N, + , Vk)"
13:00 - 14:00 Lunch
14:30 - 15:15 Maurice Margenstern
(France)
"On quasi-unilateral universal Turing machines"
14:30 - 15:15 Anca Muscholl
(Germany)
"Coding problems for trace monoids"
15:45 - 16:00 Coffee-break
16:00 - 16:30 Olivier Teytaud
(France)
"Decidability of the halting problem for Matiyasevich deterministic machines".
16:30 - 17:00 Yuri Matiyasevich
(Russia)
"Bounding the existential variables after the elimination of a bounded universal quantifier"
17:00 - 17:15 Closing of the meeting.
Announcing of the next meeting.


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