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Restricted Homological Dimensions of Complexes
Wu Dejun, Kong Fandy Lanzhou University of Technology
Abstract:
We define and study the notions of restricted Tor-dimension and Ext-dimension for unbounded complexes of left modules over associative rings. We show that, for a right (respectively, left) homologically bounded complex, our definition agrees with the small restricted flat (respectively, injective) dimension defined by Christensen et al. Furthermore, we show that the restricted Tor-dimension defined in this paper is a refinement of the Gorenstein flat dimension of an unbounded complex in some sense. In addition, we give some results concerning restricted homological dimensions under a base change over commutative Noetherian rings.
Keywords:
DG-projective (injective) complex, module-finite.
Received: 15.04.2016 Revised: 13.01.2017
Citation:
Wu Dejun, Kong Fandy, “Restricted Homological Dimensions of Complexes”, Mat. Zametki, 103:5 (2018), 667–679; Math. Notes, 103:5 (2018), 703–712
Linking options:
https://www.mathnet.ru/eng/mzm11990https://doi.org/10.4213/mzm11990 https://www.mathnet.ru/eng/mzm/v103/i5/p667
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Abstract page: | 230 | Full-text PDF : | 37 | References: | 42 | First page: | 11 |
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