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Left ϕ-biflatness and ϕ-biprojectivity of certain Banach algebras with applications | ||
AUT Journal of Mathematics and Computing | ||
مقاله 8، دوره 6، شماره 3، مهر 2025، صفحه 279-287 اصل مقاله (422.54 K) | ||
نوع مقاله: Original Article | ||
شناسه دیجیتال (DOI): 10.22060/ajmc.2024.22985.1211 | ||
نویسندگان | ||
Solaleh Salimi1؛ Amin Mahmoodi1؛ Mehdi Rostami2؛ Amir Sahami* 3 | ||
1Department of Mathematics, Central Tehran Branch, Islamic Azad University, Tehran, Iran | ||
2Department of Mathematics and Computer Science, Amirkabir University of Technology (Tehran Polytechnic), Iran | ||
3Department of Mathematics Faculty of Basic Sciences, Ilam University, P.O. Box 69315-516, Ilam, Iran | ||
چکیده | ||
This paper continues the investigation initially begun in [24]. We show that left ϕ-biflatness and left ϕ-biprojectivity are closely related to the notions of left ϕ-amenability and ϕ-inner amenability. We characterize left ϕ-biprojectivity and left ϕ-biflatness of certain semigroup algebras and some algebras related to a locally compact group. We discuss non left ϕ-biflatness of some specified triangular Banach algebras. | ||
کلیدواژهها | ||
ϕ-biflatness؛ ϕ-biprojectivity؛ ϕ-inner amenability | ||
مراجع | ||
[1] M. Alaghmandan, R. Nasr-Isfahani, and M. Nemati, Character amenability and contractibility of ab[1]stract Segal algebras, Bull. Aust. Math. Soc., 82 (2010), pp. 274–281.
[2] H. G. Dales, A. T.-M. Lau, and D. Strauss, Banach algebras on semigroups and on their compactifica[1]tions, Mem. Amer. Math. Soc., 205 (2010), pp. vi+165.
[3] M. Dashti, R. Nasr-Isfahani, and S. Soltani Renani, Character amenability of Lipschitz algebras, Canad. Math. Bull., 57 (2014), pp. 37–41.
[4] B. E. Forrest and L. W. Marcoux, Derivations of triangular Banach algebras, Indiana Univ. Math. J., 45 (1996), pp. 441–462.
[5] , Weak amenability of triangular Banach algebras, Trans. Amer. Math. Soc., 354 (2002), pp. 1435–1452.
[6] F. Ghahramani, R. J. Loy, and G. A. Willis, Amenability and weak amenability of second conjugate Banach algebras, Proc. Amer. Math. Soc., 124 (1996), pp. 1489–1497.
[7] A. Y. Helemskii, The homology of Banach and topological algebras, vol. 41 of Mathematics and its Applica[1]tions (Soviet Series), Kluwer Academic Publishers Group, Dordrecht, 1989. Translated from the Russian by Alan West.
[8] J. M. Howie, Fundamentals of semigroup theory, vol. 12 of London Mathematical Society Monographs. New Series, The Clarendon Press, Oxford University Press, New York, 1995. Oxford Science Publications.
[9] Z. Hu, M. S. Monfared, and T. Traynor, On character amenable Banach algebras, Studia Math., 193 (2009), pp. 53–78.
[10] A. Jabbari, T. M. Abad, and M. Z. Abadi, On ϕ-inner amenable Banach algebras, Colloq. Math., 122 (2011), pp. 1–10.
[11] B. E. Johnson, Approximate diagonals and cohomology of certain annihilator Banach algebras, Amer. J. Math., 94 (1972), pp. 685–698.
[12] B. E. Johnson, Cohomology in Banach algebras, Memoirs of the American Mathematical Society, No. 127, American Mathematical Society, Providence, RI, 1972.
[13] E. Kaniuth, A. T. Lau, and J. Pym, On ϕ-amenability of Banach algebras, Math. Proc. Cambridge Philos. Soc., 144 (2008), pp. 85–96.
[14] J. L. Kelley, General topology, D. Van Nostrand Co., Inc., Toronto-New York-London, 1955.
[15] A. R. Medghalchi and M. H. Sattari, Biflatness and biprojectivity of triangular Banach algebras, Bull. Iranian Math. Soc., 34 (2008), pp. 115–120, 162.
[16] M. S. Monfared, Character amenability of Banach algebras, Math. Proc. Cambridge Philos. Soc., 144 (2008), pp. 697–706.
[17] R. Nasr-Isfahani and M. Nemati, Character pseudo-amenability of Banach algebras, Colloq. Math., 132 (2013), pp. 177–193.
[18] R. Nasr-Isfahani and S. Soltani Renani, Character contractibility of Banach algebras and homological properties of Banach modules, Studia Math., 202 (2011), pp. 205–225.
[19] A. Pourabbas and A. Sahami, On character biprojectivity of Banach algebras, Politehn. Univ. Bucharest Sci. Bull. Ser. A Appl. Math. Phys., 78 (2016), pp. 163–174.
[20] P. Ramsden, Biflatness of semigroup algebras, Semigroup Forum, 79 (2009), pp. 515–530.
[21] A. Sahami, On left ϕ-biprojectivity and left ϕ-biflatness of certain Banach algebras, Politehn. Univ. Bucharest Sci. Bull. Ser. A Appl. Math. Phys., 81 (2019), pp. 97–106.
[22] A. Sahami and A. Pourabbas, On φ-biflat and φ-biprojective Banach algebras, Bull. Belg. Math. Soc. Simon Stevin, 20 (2013), pp. 789–801.
[23] A. Sahami and M. Rostami, Some cohomological notions in Banach algebras based on maximal ideal space, Iran. J. Sci. Technol. Trans. A Sci., 46 (2022), pp. 173–179.
[24] A. Sahami, M. Rostami, and A. Pourabbas, On left φ-biflat Banach algebras, Comment. Math. Univ. Carolin., 61 (2020), pp. 337–344. | ||
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