6 A ug 2 00 5 HOMOLOGICAL TRANSCENDENCE DEGREE
نویسنده
چکیده
Let D be a division algebra over a base field k. The homological transcendence degree of D, denoted by HtrD, is defined to be the injective dimension of the algebra D⊗k D ◦. We show that Htr has several useful properties which the classical transcendence degree has. We extend some results of Resco, Rosenberg, Schofield and Stafford, and compute Htr for several classes of division algebras. The main tool for the computation is Van den Bergh’s rigid dualizing complex.
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