books.google.com - This 2002 book introduces the quantum theory of gauge fields. Emphasis is placed on four non-perturbative methods: path integrals, lattice gauge theories, the 1/N expansion, and reduced matrix models, all of which have important contemporary applications. Written as a textbook, it assumes a knowledge...http://books.google.com/books/about/Methods_of_Contemporary_Gauge_Theory.html?id=9W-W2w75ulAC&q=phase+factor&utm_source=gb-gplus-shareMethods of Contemporary Gauge Theory

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## Methods of Contemporary Gauge TheoryBy Yuri Makeenko |