Descriptive Complexity, Canonisation, and Definable Graph Structure Theory (Lecture Notes in Logic) free ebook download.

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Descriptive Complexity, Canonisation, and Definable Graph Structure Theory (Lecture Notes in Logic) free ebook download

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Author(s):	Martin Grohe

Date:	2017-09-30	Format:	PDF	Language:	English	ISBN/ASIN:	1107014522
Pages:	554	OCR:		Quality:		ISBN13:	9781107014527
Uploader:	gestalt	Upload Date:	9/20/2017 10:54:20 PM

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Descriptive complexity theory establishes a connection between the computational complexity of algorithmic problems (the computational resources required to solve the problems) and their descriptive complexity (the language resources required to describe the problems). This groundbreaking book approaches descriptive complexity from the angle of modern structural graph theory, specifically graph minor theory. It develops a 'definable structure theory' concerned with the logical definability of graph theoretic concepts such as tree decompositions and embeddings. The first part starts with an introduction to the background, from logic, complexity, and graph theory, and develops the theory up to first applications in descriptive complexity theory and graph isomorphism testing. It may serve as the basis for a graduate-level course. The second part is more advanced and mainly devoted to the proof of a single, previously unpublished theorem: properties of graphs with excluded minors are decidable in polynomial time if, and only if, they are definable in fixed-point logic with counting.

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Tags: Complexity Definable Descriptive Graph Lecture Logic Notes Structure Theory

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