Algebraic K-Theory: Connections with Geometry and Topology by Barry Dayton, Charles Weibel (auth.), J. F. Jardine, V. P.

By Barry Dayton, Charles Weibel (auth.), J. F. Jardine, V. P. Snaith (eds.)

A NATO complicated research Institute entitled "Algebraic K-theory: Connections with Geometry and Topology" used to be held on the Chateau Lake Louise, Lake Louise, Alberta, Canada from December 7 to December eleven of 1987. This assembly was once together supported by means of NATO and the average Sciences and Engineering examine Council of Canada, and was once backed partially by way of the Canadian Mathematical Society. This booklet is the amount of court cases for that assembly. Algebraic K-theory is largely the examine of homotopy invariants coming up from earrings and their linked matrix teams. extra importantly probably, the topic has develop into imperative to the research of the connection among Topology, Algebraic Geometry and quantity concept. It attracts on all of those fields as a subject matter in its personal correct, however it serves in addition to a good translator for the appliance of innovations from one box in one other. The papers during this quantity are consultant of the present country of the topic. they're, for the main half, learn papers that are essentially of curiosity to researchers within the box and to these meaning to be such. there's a part on difficulties during this quantity which could be of specific curiosity to scholars; it includes a dialogue of the issues from Gersten's recognized checklist of 1973, in addition to a quick checklist of recent problems.

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S A is local. Since S-IB-module [Bass. 90]. generated. there is an -1 P The question being local. and we mayasume that B[s Y. s ES so that S -1 Since p[s-l] y. P has constant rank. P is finitely is a free o ]-module. 4. Since Corollary: If T: X ~ Y is a finite map. the natural map is an isomorphism. Proof: If {T- 1 (U)} ~ of is a cover of X. Since Y. let (T*GLn}(U) -1 T (~) denote the induced cover = GLn (T- 1 (U». GLn }. GL}. GL} n is the union of o B. DAYTON AND C. 1. 4 follows from the Leray spectral sequence HP(Y,R~*GL1) ~ HP+q(X,GL 1 ) since the stalk of H1(Spec(By ),GL 1 ) 1 R v*GL 1 at any point is = Pic(By ) = o.

One also sees easily that there is a commutative diagram: X and The H. GILLET AND C. 1. in which the right hand vertical arrow is the difference of the cycle CHP(X} ~ H2p(X) class map CHP(X}O and the obvious inclusion. ffi). Z}. O). IRIZ). e. 3{i). IRIZ); we have a map ,Po ~. IRIZ). ffi) ~ ... Z). ffi) currents of the form dCg is a d-closed. exact current. c such that dd g = oZ. ffi). ffi) then Hence there is unique up to adding h a harmonic form. ffi». rn)/~;(X». 4. The range of the map intermediate Jacobian of tp is isomorphic to the p-th (Griffiths) X: which is itself the range of the Griffiths' Abel-Jacobi homomorphism a description of which may be found in [IS].

In §3 we describe the relationship between the two theories and prove the Riemann-Roch theorem, and in §4 we outline the variants of each theory that can be used to study connections of type (1,0). H. ET AND C. E 1. 0. In this section we shall recall the basic properties of the Arithmetic Chow groups constructed in the paper [13]. We shall make some simplifying assumptions about the varieties and rings involved. and refer the interested reader to [13] and [14] for the general statements. 1. 2. of X~ Xoo' we mean a scheme Spec(Z).

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