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On adjoint resolutions and dimensions of modules

  • Lixin Mao EMAIL logo

Abstract

We introduce and investigate the adjoint resolutions and adjoint dimensions of modules. As a consequence, we give some new characterizations of weak global dimensions of coherent rings in terms of adjoint resolutions and adjoint dimensions of modules.

Award Identifier / Grant number: 11771202

Award Identifier / Grant number: BK20160771

Award Identifier / Grant number: CKJA201707

Funding statement: This research was supported by NSFC (No. 11771202), NSF of Jiangsu Province of China (No. BK20160771) and Nanjing Institute of Technology of China (No. CKJA201707).

Acknowledgements

The author would like to express his sincere thanks for the referee for his/her valuable comments and suggestions.

References

[1] J. Asensio Mayor and J. Martinez Hernández, On flat and projective envelopes, J. Algebra 160 (1993), no. 2, 434–440. 10.1006/jabr.1993.1195Search in Google Scholar

[2] M. Auslander and S. O. Smalø, Preprojective modules over Artin algebras, J. Algebra 66 (1980), no. 1, 61–122. 10.1016/0021-8693(80)90113-1Search in Google Scholar

[3] T. J. Cheatham and D. R. Stone, Flat and projective character modules, Proc. Amer. Math. Soc. 81 (1981), no. 2, 175–177. 10.1090/S0002-9939-1981-0593450-2Search in Google Scholar

[4] J. L. Chen, P-projective modules, Comm. Algebra 24 (1996), no. 3, 821–831. 10.1080/00927879608825603Search in Google Scholar

[5] R. R. Colby, Rings which have flat injective modules, J. Algebra 35 (1975), 239–252. 10.1016/0021-8693(75)90049-6Search in Google Scholar

[6] N. Q. Ding, On envelopes with the unique mapping property, Comm. Algebra 24 (1996), no. 4, 1459–1470. 10.1080/00927879608825646Search in Google Scholar

[7] N. Q. Ding and J. L. Chen, Relative coherence and preenvelopes, Manuscripta Math. 81 (1993), no. 3–4, 243–262. 10.1007/BF02567857Search in Google Scholar

[8] N. Q. Ding and J. L. Chen, On copure flat modules and flat resolvents, Comm. Algebra 24 (1996), no. 3, 1071–1081. 10.1080/00927879608825623Search in Google Scholar

[9] E. E. Enochs, Injective and flat covers, envelopes and resolvents, Israel J. Math. 39 (1981), no. 3, 189–209. 10.1007/BF02760849Search in Google Scholar

[10] E. E. Enochs and O. M. G. Jenda, Copure injective resolutions, flat resolvents and dimensions, Comment. Math. Univ. Carolin. 34 (1993), no. 2, 203–211. Search in Google Scholar

[11] E. E. Enochs and O. M. G. Jenda, Relative Homological Algebra, De Gruyter Exp. Math. 30, Walter de Gruyter, Berlin, 2000. 10.1515/9783110803662Search in Google Scholar

[12] D. J. Fieldhouse, Character modules, dimension and purity, Glasg. Math. J. 13 (1972), no. 2, 144–146. 10.1017/S0017089500001567Search in Google Scholar

[13] R. Göbel and J. Trlifaj, Approximations and Endomorphism Algebras of Modules, De Gruyter Exp. Math. 41, Walter de Gruyter, Berlin, 2006. 10.1515/9783110199727Search in Google Scholar

[14] T. Y. Lam, Lectures on Modules and Rings, Grad. Texts in Math. 189, Springer, New York, 1999. 10.1007/978-1-4612-0525-8Search in Google Scholar

[15] J. Lambek, Lectures on Rings and Modules, Blaisdell Publishing, Waltham, 1966. Search in Google Scholar

[16] L. X. Mao, Adjoint preenvelopes and precovers of modules, Publ. Math. Debrecen 88 (2016), no. 1–2, 139–161. 10.5486/PMD.2016.7305Search in Google Scholar

[17] L. X. Mao and N. Q. Ding, Relative copure injective and copure flat modules, J. Pure Appl. Algebra 208 (2007), no. 2, 635–646. 10.1016/j.jpaa.2006.03.002Search in Google Scholar

[18] C. Megibben, Absolutely pure modules, Proc. Amer. Math. Soc. 26 (1970), no. 4, 561–566. 10.1090/S0002-9939-1970-0294409-8Search in Google Scholar

[19] J. J. Rotman, An Introduction to Homological Algebra, Pure Appl. Math. 85, Academic Press, New York, 1979. Search in Google Scholar

[20] B. Stenström, Coherent rings and FP-injective modules, J. Lond. Math. Soc. 2 (1970), no. 2, 323–329. 10.1112/jlms/s2-2.2.323Search in Google Scholar

[21] R. Wisbauer, Foundations of Module and Ring Theory. A Handbook for Study and Research, Algebra Logic Appl. 3, Gordon and Breach Science Publishers, Philadelphia, 1991. Search in Google Scholar

[22] J. Xu, Flat Covers of Modules, Lecture Notes in Math. 1634, Springer, Berlin, 1996. 10.1007/BFb0094173Search in Google Scholar

Received: 2016-04-23
Revised: 2016-11-21
Accepted: 2016-12-16
Published Online: 2018-03-11
Published in Print: 2020-09-01

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