Algebraic approaches to graph transformation. Part I: basic concepts and double pushout approach
Handbook of graph grammars and computing by graph transformation
Network Algebra
A functorial semantics for multi-algebras and partial algebras, with applications to syntax
Theoretical Computer Science
Span(Graph): A Categorial Algebra of Transition Systems
AMAST '97 Proceedings of the 6th International Conference on Algebraic Methodology and Software Technology
LICS '05 Proceedings of the 20th Annual IEEE Symposium on Logic in Computer Science
Deriving bisimulation congruences in the DPO approach to graph rewriting with borrowed contexts
Mathematical Structures in Computer Science
Graph rewriting for the π-calculus
Mathematical Structures in Computer Science
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Graphs with interfaces are a simple and intuitive tool for allowing a graph G to interact with the environment, by equipping it with two morphisms J -G, I -G. These ''handles'' were used to define graphical operators, and to provide an inductive presentation of graph rewriting. A main feature of graphs with interfaces is their characterization as terms of a free algebra. So far, this was possible only with discrete interfaces, i.e., containing no edge. This note shows that a similar free construction can be performed also with disconnected interfaces, i.e., containing only nodes connected to at most one edge.