Download Algebraic K-Theory by V. Srinivas (auth.) PDF

By V. Srinivas (auth.)

Algebraic K-Theory has turn into an more and more energetic zone of analysis. With its connections to algebra, algebraic geometry, topology, and quantity conception, it has implications for a wide selection of researchers and graduate scholars in arithmetic. The publication is predicated on lectures given on the author's domestic establishment, the Tata Institute in Bombay, and in different places. a close appendix on topology was once supplied within the first variation to make the therapy available to readers with a restricted heritage in topology. the second one version additionally contains an appendix on algebraic geometry that comprises the mandatory definitions and effects had to comprehend the middle of the booklet; this makes the ebook available to a much wider audience.

A relevant a part of the publication is an in depth exposition of the tips of Quillen as contained in his vintage papers "Higher Algebraic K-Theory, I, II." A extra user-friendly facts of the theory of Merkujev--Suslin is given during this variation; this makes the therapy of this subject self-contained. An software can be given to modules of finite size and finite projective size over the neighborhood ring of an ordinary floor singularity. those effects lead the reader to a few fascinating conclusions concerning the Chow team of varieties.

"It is a excitement to learn this mathematically attractive book..." ---WW.J. Julsbergen, arithmetic Abstracts

"The e-book does an admirable activity of proposing the main points of Quillen's work..." ---Mathematical Reviews

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We work by descending induction on p; for large p, N = FpN = Fv_l N so t h a t both sides vanish. We also have WorB (A, F p - I N ) = 0. Assume that r is an isomorphism, and that Tor B (A, FvN ) = 0; we will deduce that Cv is an isomorphism, and that Tor~(A, Fv_IN ) = O. 5. The K-Theory of Rings and Schemes From the sequence 0 have an exact sequence , Fp_ 1N , FpN Tor~(A, FpN) --4 Tor~(A, FpN/Fp_IN) ---. A | ~ A| l[ 49 ~ FpN/Fp_ 1N Fp_IN ', A | , 0 we F~,N--, (FpN/Fp_,N) ---, O. ), A @B Fp_ 1N , A | B Fp N is an isomorphism in degrees _< p - 1, and A| Fp_ 1N vanishes in all higher degrees.

1)). Then there is a continuous surjective map f : IS(X)I } X. , S(x0)(n) C S ( X ) ( n ) for all n) such that IS(x0)[ is a point whose image under f is x0. We have: f " (JS(X)l, IS(x0)l) , (X, xo) induces isomorphisms on homotopy groups. Hence if X is a CW-complex, it is a homotopy equivalence Theorem. 6)). 4). Let (S n) be the simplicial set described in Ex. 2). Then the geometric realization I(S r')l is naturally homeomorphic to the n-sphere S ~. Indeed, the only 2 non-degenerate simplices of (S n) are eo e (S n)(O) and fn e (S n)(n), so I(S")I is a C W complex with exactly 2 cells.

Define u ~ GL(R) ~ GL(R) by u~ = akt 8i1 if (i, j) = (u(k),u(s (Kronecker delta) otherwise. We call u~ a 'pseudo-conjugation' of GL(R). 10). For each pseudo-conjugation u~ there is an induced map u+ 9 BGL(R) + ; B G L ( R ) + which is a homotopy equivalence. P r o o f . Since u. is a homomorphism, by an easy computation, it induces a map B G L ( R ) + ; BGL(R)+; it also induces a GL(R)/E(R)-equivariant self-map on the universal covering space B G L ( R ) + ~- B E ( R ) + (by Prop. 3), and the fact t h a t B E ( R ) ; B G L ( R ) is precisely the covering associated to E ( R ) C G L ( R ) = ~rl(BGL(R))).

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