By Tomasz Brzezinski, José Luis Gomez-Pardo, Ivan Shestakov, Patrick F. Smith

ISBN-10: 3764387416

ISBN-13: 9783764387419

ISBN-10: 3764387424

ISBN-13: 9783764387426

The 23 articles during this quantity surround the lawsuits of the International convention on Modules and Comodules held in Porto (Portugal) in 2006 and devoted to Robert Wisbauer at the get together of his sixty fifth birthday. those articles mirror Professor Wisbauer's large pursuits and provides an summary of other fields on the topic of module concept, a few of that have an extended culture while others have emerged lately. They contain issues within the formal concept of modules bordering on type thought, in ring conception, in Hopf algebras and quantum teams, and in corings and comodules.

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Homomorphisms defined on as a map on nrA and nr2[ while K1(-), are used here to denote the nrA,,F denotes the reduced norm * e. The following lemma will be useful when computing Ker(nrA). 2 A and let Let be any E F-algebra. Ker[K1(i): (where i(x) = 1®x) Proof be any finite field extension of degree F Then : is central in trf o K1(i) A If v of IR 0vK A K n. 18, the composite Kl(E ®F A) ) K1(A) K1(A) is induced by tensoring with F ) K1(E ®F A)] K1(A) has exponent dividing trf o K1(i) Since n, A, is multiplication by E ®F A, regarded as an E ®F A = An n.

Im,In] U(I) _ Z a 2p submodule of fn E nfR R. for all n, / If I C fR, (5) C [%,IQ], m,n>1 where f E Z(R) and fP E pER, then and m+n \ U(I) = ([r, n s] : m,n> 1, fmrE lm, fnsE ln, fr,fsE I) C [R,I]. So congruences (1) and (2) will both follow, once we have shown the STRUCTURE THEOREMS FOR K1 OF ORDERS CHAPTER 2. 53 relation (mod Log((l+x)(1+y)) = Log(l+x) + Log(l+y) U(I)) (6) for any I and any x,y E I. For ,each n> 1, length n let w C(w) = orbit of be the set of formal (ordered) monomials of W.

For some bimodule 0S, MORN=S and : as bimodules. 9, Mn(D) are inverse For any ring mn R (Mn(R),R)-bimodule. are precisely Ki(Mn(R)) = Ki(R) with CL those induced by identifying GLm(S) In Theorem N ®S M=R K1(S). The simplest example of this is a matrix algebra. and any n > 1, A is an "invertible" S (R). that any maximal 2P order in a simple a division algebra) is conjugate to a matrix (D algebra over the maximal order in D. This is not the case for maximal Z-orders in simple Q-algebras; but a result which is almost as good can be stated in terms of Morita equivalence.

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Modules and Comodules (Trends in Mathematics) (Trends in Mathematics) by Tomasz Brzezinski, José Luis Gomez-Pardo, Ivan Shestakov, Patrick F. Smith


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