A User’s Guide to Spectral Sequences by John McCleary PDF

By John McCleary

ISBN-10: 0521561418

ISBN-13: 9780521561419

ISBN-10: 0521567599

ISBN-13: 9780521567596

Spectral sequences are one of the so much stylish and strong tools of computation in arithmetic. This booklet describes the most vital examples of spectral sequences and a few in their such a lot excellent functions. the 1st half treats the algebraic foundations for this type of homological algebra, ranging from casual calculations. the guts of the textual content is an exposition of the classical examples from homotopy concept, with chapters at the Leray-Serre spectral series, the Eilenberg-Moore spectral series, the Adams spectral series, and, during this re-creation, the Bockstein spectral series. The final a part of the ebook treats functions all through arithmetic, together with the idea of knots and hyperlinks, algebraic geometry, differential geometry and algebra. this can be a superb reference for college students and researchers in geometry, topology, and algebra.

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Extra resources for A User’s Guide to Spectral Sequences

Example text

Be the short exact sequence associated to the 'times p' map. Suppose (C*, d) is a differential graded abelian group that is free in each degree. When we tensor C* with the coefficients, the 'times p' map results in the short exact sequence 0C* >p C* C * E/pE —) 0 and, on application of homology, an exact couple H( xp) H(C*) H(C*) H(C* 'Llp1) The spectral sequence associated to this exact couple is known as the Bockstein spectral sequence, the topic of Chapter 10. An immediate consequence of the exactness of a couple is that E becomes a differential R-module with d: E E given by d = j o k.

Suppose x2,, is the generator of A* with x9„ of degree 2n. Since powers of xan are all in even dimensions, they commute with each other and so A* Q[x2,], that is, the polynomial algebra on one generator of dimension 2n. 13* has one generator of odd degree, Y2n+1, of degree 2n + 1. Since Y9n+1 Y2n+1 1)(2n+1) ( 274+ ) 1" Y2n +1 ' Y2n+ 1, we deduce that (y2,141) 2 = 0 and so any higher power of yan+i is zero. We denote 13* by A(ahn-I-1)• the exterior algebra on one generator of dimension 2n + 1. ) Any free graded commutative algebra over 0 can be written as a tensor product of polynomial algebras and exterior algebras on the generators of appropriate dimensions.

From Chapter 1, the reader is acquainted with several algebraic tricks that allow further calculation. In the nontrivial cases, it is often a deep geometric idea that is caught up in the knowledge of a differential. Although we have our spectral sequence indexed by r = 1, 2, „ . , it is clear that the indexing can begin at any integer and most often the sequence 30 2. What is a spectral sequence? begins at r = 2, where Er is something familiar. In contrast with the first quadrant restriction of Chapter 1, the target of a general spectral sequence is less obvious to define.

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A User’s Guide to Spectral Sequences by John McCleary


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