LOGIC and FINITE MODELS



University Paris II



January 9th-10th 1998



Location : The University is located on "12 Place du Pantheon", Metro : Luxembourg or Maubert or Monge. The talks will be given in the "Salle des Conseils", on the 2nd floor. (When you enter on the place du Pantheon, follow the gallery on the left until you reach the "gallerie Soufflot". Take the main stairs to reach the 2nd floor. The salle des conseils will then be on your left.)



Friday January 9th


Chair : Etienne Grandjean
9h15-10h15
Descriptive Complexity and Lower Bounds T. Schwentick, Mainz
10h15-10h45
Are lower bounds easier on the reals? Pascal KOIRAN, Lyon
10h45-11h15
Pause
11h15-11h45
Efficient approximation algorithms for the \\[0,7 em] sum of subsets problem C. Bazgan, Orsay
11h45-12h15
Complexity of term rewritin g theory Helene Touzet, Nancy


Lunch, Appartement decanal



Chair : Irene Guessarian
14h-14h30
La construction d'un dessin planaire d'un graphe en logique du second-ordre monadique Bruno COURCELLE, Bordeaux
14h30-15h
Expression of graph properties by unary functions Solomampionona RANAIVOSON, Caen
15h-15h30
Une axiomatisation au premier ordre des pseudo-droites B. Courcelle et F. Olive
15h30-16h
Pause, Appartement decanal
16h- 16h30
On counting $AC^0$ circuit with negative constants LeThanh Huong, SANTHA Miklos, Orsay
16h30-17h
Very ramified recurrence with substitution and Alogtime Jean-Yves Marion, Nancy
17h-17h30
Testeurs exacts et approche's Frederic Magniez, Orsay

Saturday January 10th


Chair : Bruno Courcelle
9h-10h
Towards a logic for polynomial time M. Grohe, Freiburg
10h-10h30
Querying Spatial Data bases via Topological Invariants L. Segoufin, INRIA
10h30-11h
Transformations of constrained logic programs Nacera Bensaou, Paris
11h-11h30
Pause
11h30-12h
Integrity constraints, updates in relational and deductive databases A. Ait-Bouziad, I. Guessarian, Paris
12h-12h30
Hierarchies of counting problems Avy Sharell, Orsay

Un ajustement au programme? direct email pour mdr