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17-21 August 2009, EMU 2009: Effective Mathematics of the Uncountable, New York, U.S.A.

Date: 17-21 August 2009
Location: New York, U.S.A.

Although classical computable model theory is most naturally concerned with countable domains, several methods---some old, some new---extend its basic concepts to uncountable structures. The purpose of this workshop is to study these various extensions of effectivity to the uncountable, bringing together experts in such topics as sigma-definable structures, alpha-recursion theory, E-recursion thoery, ordinal computability, Blum-Shub-Smale machines, infinite time Turing machines and locally computable structures, among others.

This workshop is the second of its kind, after the inaugural EMU in 2008. In the 2009 workshop we plan to provide tutorial-type introductions to models of computation which were not discussed last year, as well as discuss progress made since last year. A particular theme we plan to focus on is the role of a computable well-ordering of the universe of a structure. We will contrast the approaches which allow such an ordering with those which forbid it. We expect this will have methodological repercussions for the study of effective model theory on countable structures as well.

For more information, see the EMU2008 conference site at


Noam Greenberg,
Joel Hamkins,
Denis Hirschfeldt,
Russell Miller,

This EMU workshop is funded by a generous grant from the Templeton Foundation, a part of their program Exploring the Infinite, Phase I: Mathematics and Mathematical Logic.

All interested participants are welcome to attend the workshop. There is no registration fee. Limited funds are available to support graduate student and junior faculty participants. Please contact Denis Hirschfeldt or the other organizers about travel funding.

Please note that this newsitem has been archived, and may contain outdated information or links.