Titlebook: ;

毗鄰

Tutorial introduction to the algebraic approach of graph grammars based on double and single pushouwriting. Inheriting the powerful toolbox of category theory, its abstract version as a (single resp. double) pushout leads to highly compact and elegant proofs especially for the basic constructions of sequential and parallel independent derivations as well as for concurrent and amalgamated producti

Arctic

GraphEd: An interactive tool for developing graph grammars,entity relationship diagrams, petri nets, electrical circuits, VLSI circuits, flowcharts or even arbitrary diagrams. Its unique feature is the ability to handle graph grammars. They are useful both for theoretical investigations and as parametrisized graph macros.

Left-Atrium

An algebraic theory of graph reduction,ing reduction rules. The method is constructive in the sense that we describe an algorithm which will produce, from a formula in monadic second order logic and an integer . such that the class defined by the formula is of treewidth ≤ ., a set of rewrite rules that reduces any member of the class to

ERUPT

Programming with very large graphs,ing Graph Grammars, it is an improvement on existing techniques for describing the families of regular, scalable communication graphs. We expect that ParaGraph will prove useful as a testbed for new techniques for describing, visualizing and analyzing the structure of .. This work describes ongoing

Preamble

尾隨

蚊子

Construction of map OL-systems for developmental sequences of plant cell layers,is to construct a map OL-system which emphasizes regularities in the patterns. The indirect construction method discussed in this paper is based on the successive specification of a developmental sequence by a cell system, a double wall map OL-system (dm-system) and an mBPMOL-system (sm-system), res

愛哭

使高興

Cycle chain code picture languages,ely. A picture word describes a walk in the plane; its trace is the picture it describes. A set of picture words describes a (chain code) picture language..A cycle means a closed curve in the discrete Cartesian plane. It is elementary, if the curve is simple and has no crossings. Cycles are among th

靦腆