The linear concurrent constraint programming language Euler

(Draft v 0.1)

Vijay Saraswat

IBM TJ Watson Research Center

March 31, 2004


We present a simple applied linear concurrent constraint programming (lcc) language, Euler, intended primarily for graph rewriting applications, as in formal molecular biology. The language permits set-forming operations in its term language, and the checking of (in-)equality constraints, but does not allow the imposition of equality constraints. Configurations may be understood as (hyper-)graphs, with atomic formulas representing nodes and logical variables representing (hyper-)edges, as usual. Rules may match and replace arbitrary (finite) subgraphs, while adding new nodes and edges.

The operational semantics of the language is specified by the general lcc framework, specialized to permit reasoning about additional operations.

We show that it can directly represent symbolic signaling pathways in molecular biology, of the kind studied by Danos and Laneve.

Keywords: linear concurrent constraint programming, lcc, Euler, graphs, graph-rewriting, formal molecular biology

  title =        {Euler: an applied lcc language for graph rewriting},
  author =       {Vijay Saraswat},
  institution= {IBM {TJ} {W}atson {R}esearch {C}enter},
  month =        mar,
  year =         "2004"
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