Advances in Representation Theory of Algebras by David J. Benson, Henning Krause, Andrzej Skowronski

By David J. Benson, Henning Krause, Andrzej Skowronski

This quantity provides a set of articles dedicated to representations of algebras and comparable themes. Dististinguished specialists during this box provided their paintings on the overseas convention on Representations of Algebras which came about 2012 in Bielefeld. the various expository surveys are incorporated right here. Researchers of illustration concept will locate during this quantity attention-grabbing and stimulating contributions to the advance of the topic.

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Mod p; h2p 2 /. If p D 2 this gives no information, but for p odd it gives a genuine restriction on the vector bundles that can occur this way. 14. 14. F; ph/. F/. 15. i // D i 2 C5i C10. M / for a module of stable constant Jordan type Œ12 . FHM /. A similar analysis of Chern classes shows that for large rank and large primes, the only small stable constant Jordan type is Œ1s . The following theorem appears in Benson [5]. 16. r 1; p 2/ then a1 D D a t D 1. Proof. p; hp 1 //: j D1 This is a polynomial of degree a Ä p 2.

In preparation. [74] Y. Miyashita, Tilting modules of finite projective dimension. Math. Z. 193 (1986), 113–146. [75] P. Nicolás and M. Saorín, Generalized tilting theory. RT]. [76] F. Okoh, Cotorsion modules over tame finite-dimensional hereditary algebras. In Representations of algebras. Lecture Notes in Math. 903, Springer, Berlin 1980, 263–269. [77] D. Pospíšil and J. Trlifaj, Tilting for regular rings of Krull dimension two. J. Algebra 336 (2011), 184–199. [78] J. Rickard and A. Schofield, Cocovers and tilting modules.

So M is endotrivial. Dade [12] classified these for kE, and M Š n k (n 2 Z). These modules do indeed have stable constant Jordan type Œ1 if n is even, Œp 1 if n is odd. Single stable Jordan block. Carlson, Friedlander and Pevtsova [8] conjectured that there is no module of stable constant Jordan type Œ2 if p 5 and r 2. The following theorem (Benson [3]) proves a stronger statement. 19. If r Jordan type Œa. 2 and 2 Ä a Ä p 2 then there is no module of stable constant Proof. 15 and the remark following it, ƒaC1 M has constant Jordan type with all Jordan blocks of length p.

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