ISSN:0092-7872    

DOI:10.1080/00927879408825157

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

ISSN:0092-7872    

DOI:10.1080/00927879408825158

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

ISSN:0092-7872    

DOI:10.1080/00927879408825159

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

摘要:

In this paper we obtain a Peirce decomposition for some train algebras of rankn; the multiplication table for the proper subspaces is given. Some additional results for train algebras of rank 4 are proved and a description of those train algebras of rank 4, havingA½= 0, is given by pairs of bilinear mappings.

ISSN:0092-7872    

DOI:10.1080/00927879408825160

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

摘要:

The aim of this paper is to show that 6-canonical maps of nonsingular minimal 3 folds of general type are birational forpg(X)≥2.

ISSN:0092-7872    

DOI:10.1080/00927879408825161

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

摘要:

Letuq(s[(2)) denote the quantum enveloping algebra of s((2) over a field k. In this note we show that if q is a root of unity, then the coradical filtration {Hn}n≥0 ofuq(s[(2)) is the filtration by a certain degree function depending on the order ofq4and on the characteristic ofk. The degree function will be explicitly described in Section 2 for chars= 0 and in Section 3 for chark=s> 0.

ISSN:0092-7872    

DOI:10.1080/00927879408825162

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

ISSN:0092-7872    

DOI:10.1080/00927879408825163

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

ISSN:0092-7872    

DOI:10.1080/00927879408825164

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

摘要:

Inspired by a recent paper by Deligne [2], we extend the Tannaka-Krein duility results (over a field) to the non-commutative situation. To be precise, we establish a 1-1 corresponde:ice between ‘tensorial autonomous categories’ equipped with a ‘fibre functor’ (i. e. tannakian categories without the commutativity condition on the tensor product), and ‘quantum groupoids’ (as defined by Maltsiniotis, [9]) which are ‘transitive’ (7.1.). When the base field is perfect, a quantum groupoid over SpecBis transitive iff it is projective and faithfully fiat overB⊗kB. Moreover, the fibre functor is unique up to ‘quantum isomorphism’ (7.6.). Actually, we show Tannaka-Krein duality results in the more general setting where there is no monoidal structure on the category (and the functor); the algebraic object corresponding to such a category is a ‘semi-transitive’ coalgebroid (5.2. and 5.8.).

ISSN:0092-7872    

DOI:10.1080/00927879408825165

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor

ISSN:0092-7872    

DOI:10.1080/00927879408825166

出版商:Gordon and Breach Science Publishers Ltd.    

年代:1994

数据来源: Taylor