<?xml version="1.0" encoding="UTF-8" standalone="yes"?><oembed><version><![CDATA[1.0]]></version><provider_name><![CDATA[Azimuth]]></provider_name><provider_url><![CDATA[https://johncarlosbaez.wordpress.com]]></provider_url><author_name><![CDATA[John Baez]]></author_name><author_url><![CDATA[https://johncarlosbaez.wordpress.com/author/johncarlosbaez/]]></author_url><title><![CDATA[Higher-Dimensional Rewriting in Warsaw (Part&nbsp;1)]]></title><type><![CDATA[link]]></type><html><![CDATA[<div align="center">
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<p>This summer there will be a conference on higher-dimensional algebra and rewrite rules in Warsaw.  They want people to submit papers!   I&#8217;ll give a talk about presentations of symmetric monoidal categories that arise in electrical engineering and control theory.  This is part of the <a href="http://math.ucr.edu/home/baez/networks/">network theory</a> program, which we talk about so often here on Azimuth.</p>
<p>There should also be interesting talks about combinatorial algebra, homotopical aspects of rewriting theory, and more:</p>
<p>&bull; <a href="http://hdra15.gforge.inria.fr/">Higher-Dimensional Rewriting and Applications</a>, 28-29 June 2015, Warsaw, Poland.  Co-located with the RDP, RTA and TLCA conferences.   Organized by Yves Guiraud, Philippe Malbos and Samuel Mimram.</p>
<h3> Description </h3>
<p>Over recent years, rewriting methods have been generalized from strings and terms to richer algebraic structures such as <a href="http://www.ams.org/notices/200406/what-is.pdf">operads</a>, <a href="http://en.wikipedia.org/wiki/Monoidal_category">monoidal categories</a>, and more generally <a href="http://en.wikipedia.org/wiki/Higher_category_theory">higher dimensional categories</a>. These extensions of rewriting fit in the general scope of higher-dimensional rewriting theory, which has emerged as a unifying algebraic framework. This approach allows one to perform homotopical and homological analysis of rewriting systems (<a href="http://iml.univ-mrs.fr/~lafont/pub/homotopy-small.pdf">Squier theory</a>). It also provides new computational methods in combinatorial algebra (Artin-Tits monoids, Coxeter and Garside structures), in <a href="http://en.wikipedia.org/wiki/Homotopical_algebra">homotopical</a> and <a href="http://en.wikipedia.org/wiki/Homological_algebra">homological algebra</a> (construction of <a href="http://en.wikipedia.org/wiki/Model_category">cofibrant replacements</a>, <a href="http://www.maths.gla.ac.uk/~ukraehmer/connected.pdf">Koszulness</a> property). The workshop is open to all topics concerning higher-dimensional generalizations and applications of rewriting theory, including</p>
<p>&bull; higher-dimensional rewriting: polygraphs / computads, higher-dimensional generalizations of string/term/graph rewriting systems, etc.</p>
<p>&bull; homotopical invariants of rewriting systems: homotopical and homological finiteness properties, Squier theory, algebraic Morse theory, coherence results in algebra and higher-dimensional category theory, etc.</p>
<p>&bull; linear rewriting: presentations and resolutions of algebras and operads, Gröbner bases and generalizations, homotopy and homology of algebras and operads, Koszul duality theory, etc.</p>
<p>&bull; applications of higher-dimensional and linear rewriting and their interactions with other fields: calculi for quantum computations, algebraic lambda-calculi, proof nets, topological models for concurrency, homotopy type theory, combinatorial group theory, etc.</p>
<p>&bull; implementations: the workshop will also be interested in implementation issues in higher-dimensional rewriting and will allow demonstrations of prototypes of existing and new tools in higher-dimensional rewriting.</p>
<h3> Submitting </h3>
<p>Important dates:</p>
<p>&bull; Submission: April 15, 2015</p>
<p>&bull;  Notification: May 6, 2015</p>
<p>&bull;  Final version: May 20, 2015</p>
<p>&bull;  Conference: 28-29 June, 2015</p>
<p>Submissions should consist of an extended abstract, approximately 5 pages long, in standard article format, in PDF. The page for uploading those is <a href="https://easychair.org/conferences/?conf=hdra2015">here</a>.  The accepted extended abstracts will be made available electronically before the<br />
workshop.</p>
<h3> Organizers </h3>
<p>Program committee:</p>
<p>&bull;  Vladimir Dotsenko (Trinity College, Dublin)</p>
<p>&bull;  Yves Guiraud (INRIA / Université Paris 7)</p>
<p>&bull;  Jean-Pierre Jouannaud (École Polytechnique)</p>
<p>&bull;  Philippe Malbos (Université Claude Bernard Lyon 1)</p>
<p>&bull;  Paul-André Melliès (Université Paris 7)</p>
<p>&bull;  Samuel Mimram (École Polytechnique)</p>
<p>&bull;  Tim Porter (University of Wales, Bangor)</p>
<p>&bull;  Femke van Raamsdonk (VU University, Amsterdam)</p>
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