books.google.com - Explore the main algebraic structures and number systems that play a central role across the field of mathematicsAlgebra and number theory are two powerful branches of modern mathematics at the forefront of current mathematical research, and each plays an increasingly significant role in different branches...http://books.google.com/books/about/Algebra_and_Number_Theory.html?id=w31ZQbGqsvEC&q=orthogonal&utm_source=gb-gplus-shareAlgebra and Number Theory

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## Algebra and Number Theory: An Integrated ApproachBy Martyn R. Dixon, Leonid A. Kurdachenko, Igor Ya Subbotin |