Hunt, Alexis2015-09-082015-09-082015-09-082015http://hdl.handle.net/10012/9648The field of graph structure theory was given life by the Graph Minors Project of Robertson and Seymour, which developed many tools for understanding the way graphs relate to each other and culminated in the proof of the Graph Minors Theorem. One area of ongoing research in the field is attempting to strengthen the Graph Minors Theorem to sets of graphs, and sets of sets of graphs, and so on. At the same time, there is growing interest in the applications of logic and formal languages to graph theory, and a significant amount of work in this field has recently been consolidated in the publication of a book by Courcelle and Engelfriet. We investigate the potential applications of logic and formal languages to the field of graph structure theory, suggesting a new area of research which may provide fruitful.engraph structurelogicformal languageslanguage theorymonadic second-order logictree-decompositionshyperedge replacementHR algebragraph theorywell-quasi-orderingcone graphcone idealtree-generatorobstruction-widthMaster ThesisCombinatorics and Optimization