%O ? Springer-Verlag Berlin Heidelberg 2010. The final publication is available at www.springerlink.com. %I Springer %V 6084 %T An Algebra of Hierarchical Graphs %P 205-221 %B Trustworthly Global Computing (TCG 2010) %R 10.1007/978-3-642-15640-3_14 %S Lecture Notes in Computer Science %A Roberto Bruni %A Fabio Gadducci %A Alberto Lluch-Lafuente %X We define an algebraic theory of hierarchical graphs, whose axioms characterise graph isomorphism: two terms are equated exactly when they represent the same graph. Our algebra can be understood as a high-level language for describing graphs with a node-sharing, embedding structure, and it is then well suited for defining graphical representations of software models where nesting and linking are key aspects. %E Martin Wirsing %E Martin Hofmann %E Axel Rauschmayer %D 2010 %L eprints144