[TYPES/announce] deadline extension: PxTP '11

[Aaron Stump]

We have extended the deadline to Wednesday, May 11th, for this workshop,
which should be relevant to types-announce readers interested in proofs
and proof checking.

Aaron and Pascal
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The First International Workshop on
Proof Exchange for Theorem Proving (PxTP)
http://pxtp2011.loria.fr/

associated with

The Conference on Automated Deduction (CADE), 2011.
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The goal of this new workshop is to bring together researchers working
on proof production from automated theorem provers with potential
consumers of proofs. Machine-checkable proofs have been proposed for
applications like proof-carrying code and certified compilation, as
well as for exchanging knowledge between different automated reasoning
systems. For example, interactive theorem provers can import results
from otherwise untrusted high-performance solvers, by means of proofs
the solvers produce. In such situations, one automated reasoning tool
can make use of the results of another, without having to trust that
the second tool is sound. It is only necessary to be able to
reconstruct a proof that the first tool will accept, in order to
import the result without increasing the size of the trusted computing
base.

This simple idea of proof exchange for theorem proving becomes quite
complicated under the real-world constraints of highly complex and
heterogeneous proof producers and proof consumers. For example, even
the issue of a standard proof format for a single class of solvers,
like SMT solvers, is quite difficult to address, as different solvers
use different inference systems. It may be quite challenging, from an
engineering and possibly also theoretical point of view, to fit these
into a single standard format. Emerging work from several groups
proposes standard meta-languages or parametrized formats to achieve
flexibility while retaining a universal proof language.
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Topics of interest for this workshop include all aspects of proof
exchange among automated reasoning tools. More specifically, some
suggested topics are:

-- proposed proof formats for different classes of logic solvers (SAT,
SMT, QBF, First-Order ATP, Higher-Order ATP, Rewriting, etc.).

-- meta-languages and logical frameworks for proofs, particularly
proof systems designed for solvers.

-- proof checking tools and algorithms.

-- proof translation and methods for importing proofs, including proof
replaying or reconstruction.

-- tools and case studies related to analyzing proofs produced by
solvers, and proof metrics.

-- applications relying on importing proofs from automated theorem
provers, such as certified static analysis, proof-carrying code, or
certified compilation.

-- data structures and algorithms for improved proof production in
solvers (for example, more time- or memory-efficient ways of
representing proofs).
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Submissions

Submitted papers must fall into one of the following two categories:

* Short papers: up to 6 pages, tool papers or experience reports
* Regular papers: 12-15 pages, research papers

Submissions will be refereed by the program committee, which will
select a balanced program of high-quality contributions.

Submissions should be in standard-conforming Postscript or PDF. Final
versions should be prepared in LaTeX using the easychair.cls class
file.

To submit a paper, go to the EasyChair PxTP page
http://www.easychair.org/conferences/?conf=pxtp2011
and follow the instructions there.

PxTP will have no formal proceedings, but we anticipate a joint open
call, together with the PSATTT workshop (also at CADE 2011), for a
special issue of a journal with PxTP and PSATTT post-proceedings.
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Important dates

Submission of papers: May 11th, 2011 (Extended)
Notification: May 30th, 2011
Camera ready versions due: June 27th, 2011
Workshop: August 1st, 2011
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Organizers

Pascal Fontaine (INRIA, University of Nancy)
Aaron Stump (The University of Iowa)

Program Committee

Clark Barrett (New York University)
Christoph Benzmüller (Articulate Software)
Sacha Böhme (Technische Universität München)
Amy Felty (University of Ottawa)
Pascal Fontaine (INRIA, University of Nancy)
Leonardo de Moura (Microsoft research)
Hans de Nivelle (University of Wrocław)
David Pichardie (INRIA Rennes)
Stephan Schulz (Technische Universität München)
Aaron Stump (The University of Iowa)
Geoff Sutcliffe (University of Miami)
Laurent Théry (INRIA)
Tjark Weber (University of Cambridge)
Bruno Woltzenlogel Paleo (Technische Universität Wien)
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