Collective Wisdom : Principles and mechanisms

For those interested, (the preliminary version of) the contributed papers to the colloquium "Collective Wisdom : Principles and mechanisms" (held on 22-23 may 2008) are online.

Perspectives philosophiques sur l'agrégation des jugements

Séminaire « Perspectives philosophiques sur l'agrégation des jugements »
Lundi 30 juin 2008 à l'IHPST et Mardi 1 juillet à l' Université Paris-Dauphine (détails ci-dessous)

Programme
Lundi 30 juin | Lieu : Institut d'histoire et de philosophie des sciences et des techniques, 13 rue du Four, 75006 Paris (métro Mabillon). Grande salle, 2e étage
14h-15h30: Mikaël Cozic (IHPST & GREGHEC, Paris)« Une introduction à la théorie de l'agrégation logique »
15h30-17h : Philippe Mongin (GREGHEC & IHPST, Paris)« Quelques difficultés inattendues du principe d'unanimité de Pareto »
17h-18h30 : Christian List (London School of Economics)« Group Deliberation and the Revision of Judgments: An Impossibility Result »
Atelier « Theory of Logical Aggregation »

Mardi 1er juillet 2008 | Lieu : Université Paris-Dauphine, Place du Maréchal de Lattre de Tassigny, 75116 Paris (métro Porte Dauphine). Salle A 709 de la nouvelle aile (bâtiment A).

9h30-11h : Elad Dokow (Technion, Haifa) et Ron Holzman (Technion, Haifa & Paris-Dauphine) « Aggregation of Non-Binary Evaluations: Towards a Characterization of Impossibility Domains »
11h-12h30 : Franz Dietrich (Universiteit de Maastricht & London School of Economics) et Philippe Mongin (GREGHEC & IHPST, Paris)« The Premiss-Based Approach to Judgment Aggregation » (voir ici)
14h-15h30 : Klaus Nehring (University of California at Davis) et Clemens Puppe (Universität Karlsruhe)« Efficient Judgment Aggregation » (voir ici
16h-17h30 : Franz Dietrich (Universiteit Maastricht & London School of Economics) et Christian List (London School of Economics)« Majority Voting on Restricted Domains » (voir ici)

Paris-Oxford Workshop

Paris-Oxford Workshop
LANGUAGE & ONTOLOGY
June 26-28 2008, grande salle de l'IHPST, 13 rue du Four, Paris
Program here

Notre Dame Mathematical Lectures

In Notre Dame Mathematical Lectures series, one finds (.pdf):

Skolem : Abstract Set Theory (1962)
Curry : A Theory of Formal Deducibility(1950)

Sider's Logic for Philosophy (update)

Here's an updated link to Ted Sider's draft : Logic for Philosophy

[h.t. David Nicolas]

Thibault Gajdos

Lundi 9 juin (14h-16h), le séminaire Philform (IHPST) reçoit Thibault Gajdos(CNRS-Paris 1):

"The Ignorant Observer"

Most prominent models of economic justice (and especially those proposed by Harsanyi and Rawls) are based on the assumption that impartiality is required for making moral decisions. However, although Harsanyi and Rawls agree on that and furthermore agree on the notion that impartiality can be obtained under appropriate conditions of ignorance, they strongly disagree on the consequences of these assumptions. According to Harsanyi, they provide a justification for the utilitarian doctrine, whereas Rawls considers that they imply egalitarianism. We propose here an extension of Harsanyi's Impartial Observer Theorem, that is based on the representation of ignorance as the set of all possible probability distributions over individuals. We obtain a characterization of the observer's preferences that, under our most restrictive conditions, is a convex combination of Harsanyi's and Rawls' criteria. Furthermore, this representation is ethically meaningful, in the sense that individuals' utilities are cardinally measurable and fully comparable. This allows us to conclude that the impartiality requirement cannot be used to decide between Rawls' and Harsanyi's positions. Finally, we defend the view that a (strict) combination of Harsanyi's and Rawls' criteria provides a reasonable rule for social decisions.

"Mathematical Understanding"

Workshop « Mathematical Understanding » | 9-13 juin 2008
Département Histoire et Philosophie des Sciences, Université Denis Diderot Paris 7,
Les Grands Moulins, Salle du Campanile, Accès C - 8ème étage.
10 Esplanade des Grands Moulins - Paris 13ème ardt.
Plans et itinéraires

Programme
Lundi 9 juin
9h30-11h00 :Jeremy Gray (Open University London)« Understanding [and] Riemann surfaces »
11h15-12h45 : Karine Chemla (CNRS Rehseis)« Understanding while proving the correctness of algorithms. Reflexions based on ancient Chinese sources »
14h30-16h00 : Alain Michel (Université d’Aix-Marseille) « La théorie de la mesure: origines et prolongements »
16h15-17h45 : Renaud Chorlay (Université de Paris 8 - Rehseis)« Making sense of it with structures : the mathematical (and philosophical) background to Charles Ehresmann's work »
18h00-19h30 : Andrei Rodin (Université Denis Diderot de Paris 7)« Category theory, Mathematical Structuralism and Mathematical Hermeneutics »
Mardi 10 juin
14h00-15h30 : Ken Manders (University of Pittsburgh)« On Mathematical Understanding »
15h45-17h15 : Catherine Goldstein (CNRS, Institut de Mathématiques, Paris 6)« Charles Hermite, Mathematical Understanding and Mathematical Nature »
17h30-19h00 :Ivahn Smadja (Université Denis Diderot Paris 7)« Diverging Thrusts. Contrasting Insightful Plasticity with Articulate Embeddings »
Mercredi 11 juin
9h30-11h00 : Jeremy Avigad (Carnegie Mellon)« The role of the diagram in Euclid's Elements »
11h15-12h45 : Philippe Nabonnand (Université de Nancy 2)« La polémique entre Poncelet et Von Staudt : comprendre la dualité »
14h30-16h00 : Gerhard Heinzmann (Université de Nancy 2)« Mathematical Comprehension and Intuition »
16h15-17h45 : Mark Steiner (University of Jerusalem)« Getting more out of mathematics than we put in: the case of complex numbers and their generalizations »
18h00-19h30 :Michel Paty (CNRS Rehseis)« La structure du rationnel dans l’invention de la théorie de la relativité et de la théorie quantique »
Jeudi 12 juin
9h30-11h00 : Jan von Plato (University of Helsinki)« A combinatorial view of mathematical proofs »
11h15-12h45 : Joël Merker (ENS Ulm, DMA & LATP)« Insights towards the speculative thought of formal computation »
14h30-16h45 : Andrew Arana (Kansas State University) & Mic Detlefsen (University of Notre-Dame)« Purity and Understanding »
17h-18h30 :Jean-Jacques Szczeciniarz (Université Denis Diderot Paris 7)« Le galoisisme de Grothendieck »
Vendredi 13 juin
9h30-11h00 : Paolo Mancosu (University of Berkeley)« Understanding, Explanation and Unification »
11h15-12h45 : Stewart Shapiro (Ohio State University)« An 'i' for an i. Reference and indiscernibility »
14h30-16h00 : Marco Panza (CNRS, Rehseis)« From naturals to reals using abstraction »
16h15-17h45 José Ferreiros (University of Sevilla)« Conceptual understanding, logical consistency, and mathematical existence »
18h Discussion générale

Newton international fellowships

Newton international fellowships. The closing date for the first round of applications is 4 August 2008.