S. V. Ivanov The Bounded and Precise Word Problems for Presentations of Groups (Memoirs of the American Mathematical Society, Band 264) - internet üzerinden indir

The Bounded and Precise Word Problems for Presentations of Groups (Memoirs of the American Mathematical Society, Band 264)

Ders Kitapları

The author introduces and studies the bounded word problem and the precise word problem for groups given by means of generators and defining relations. For example, for every finitely presented group, the bounded word problem is in NP, i.e., it can be solved in nondeterministic polynomial time, and the precise word problem is in PSPACE, i.e., it can be solved in polynomial space. The main technical result of the paper states that, for certain finite presentations of groups, which include the Baumslag-Solitar one-relator groups and free products of cyclic groups, the bounded word problem and the precise word problem can be solved in polylogarithmic space. As consequences of developed techniques that can be described as calculus of brackets, the author obtains polylogarithmic space bounds for the computational complexity of the diagram problem for free groups, for the width problem for elements of free groups, and for computation of the area defined by polygonal singular closed curves in the plane. The author also obtains polynomial time bounds for these problems.

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İngilizce Independently published HACHETTE LIVRE-BNF MDPI AG Springer LAP LAMBERT Academic Publishing Rusça Fransızca Türkçe ERWIN N GRISWOLD İspanyolca ROBERT H BORK WADE H MCCREE Gale, U.S. Supreme Court Records Additional Contributors Kolektif Almanca Book on Demand Ltd.

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