×

Unit groups of commutative modular group algebras. (English) Zbl 07910540

Summary: This paper analyzes some of the fundamental results of the unit groups of the commutative modular group algebras. We introduce a more visible and concise form of a number of these results. We consider with a corresponding justification some essentially inexact and unproved results in some papers and for certain of them either we mark the corrections or we point out the corrections, which are founded in another papers.

MSC:

20C07 Group rings of infinite groups and their modules (group-theoretic aspects)
20C05 Group rings of finite groups and their modules (group-theoretic aspects)
16S34 Group rings
16U60 Units, groups of units (associative rings and algebras)
20K10 Torsion groups, primary groups and generalized primary groups
20K20 Torsion-free groups, infinite rank
20K21 Mixed groups
20K25 Direct sums, direct products, etc. for abelian groups
Full Text: DOI

References:

[1] Berman, S. D., Group algebras of countable abelian \(p\)-groups, Dokl. Akad. Nauk SSSR175 (1967) 514-516. · Zbl 0178.02702
[2] Berman, S. D., Group algebras of countable abelian \(p\)-groups, Publ. Math. Debrecen14 (1967) 365-405. · Zbl 0281.20006
[3] May, W., Isomorphism of group algebra, J. Algebra40 (1976) 10-18, https://doi.org/10.1016/0021-8693(76)90083-1. · Zbl 0329.20002
[4] Karpilovsky, G., Unit Groups of Group Rings (Longman Sci. and Techn., Harlow, 1989). · Zbl 0687.16010
[5] Fuchs, L., Infinite Abelian Groups, vol. 1, (Academic Press, London, New York, 1970). · Zbl 0209.05503
[6] Fuchs, L., Infinite Abelian Groups, vol. 2, (Academic Press, London, New York, 1973). · Zbl 0257.20035
[7] Mollov, T., On the unit groups of modular group algebras of primary abelian groups of arbitrary cardinality. I, Publ. Math. Debrecen18 (1971) 9-21(in Russian).
[8] Mollov, T., On the Sylow’s \(p\)-subgroups of the group algebras of countable abelian groups, C. R. Acad. Bulgar. Sci.27 (1974) 733-735(in Russian). · Zbl 0335.20005
[9] Mollov, T., Sylow \(p\)-subgroups of group algebras of countable abelian groups on a field of characteristic \(p\), Serdica2 (1976) 219-235(in Russian). · Zbl 0358.20002
[10] May, W., Modular group algebras of totally projective \(p\)-primary groups, Proc. Amer. Math. Soc.76 (1979) 31-34, https://doi.org/10.2307/2042911. · Zbl 0388.20041
[11] May, W., Modular group algebras of simply presented abelian groups, Proc. Amer. Math. Soc.104 (1988) 403-409, https://doi.org/10.1090/s0002-9939-1988-0962805-2. · Zbl 0691.20008
[12] May, W., Totally projective unit groups in modular abelian group algebras, Forum Math.18 (2006) 603-609, https://doi.org/10.1515/forum.2006.031. · Zbl 1118.20005
[13] Danchev, P., Topologically pure and basic subgroups in commutative group rings, C. R. Acad. Bulgar. Sci.48 (1995) 7-10. · Zbl 0853.16040
[14] Danchev, P., Isomorphism of commutative modular group algebras, Serdica23 (1997) 211-224. · Zbl 0977.20003
[15] Danchev, P., Isomorphism of modular group algebras of totally projective abelian groups, Commun. Algebra28 (2000) 2521-2531, https://doi.org/10.1080/00927870008826975. · Zbl 0958.20003
[16] Danchev, P., Normed units in abelian group rings, Glasgow Math. J.43 (2001) 365-373, https://doi.org/10.1017/s0017089501030166. · Zbl 0997.16019
[17] Danchev, P., The Direct Factor Problem for modular group algebras of isolated direct sums of torsion-complete abelian groups, SEA Bull. Math.26 (2002) 559-565, https://doi.org/10.1007/s100120200059. · Zbl 1055.16035
[18] May, W., Mollov, T. and Nachev, N., Isomprphism of modular group algebras of \(p\)-mixed abelian groups, Commun. Algebra38 (2010) 1988-1999, https://doi.org/10.1080/00927871003704974. · Zbl 1215.20007
[19] May, W., Units of modular \(p\)-mixed abelian group algebras, in Models, Modules and Abelian Groups (de Gruyter, Berlin, 2008), 267-276, https://doi.org/10.1515/9783110203035.267. · Zbl 1188.16032
[20] Danchev, P., Sylow \(p\)-subgroups of modular abelian group rings, C. R. Acad. Bulgar. Sci.54 (2001) 5-8. · Zbl 0972.16018
[21] Mollov, T., On the unit groups of the modular group algebras of a primary abelian groups of an arbitrary cardinality. II, Publ. Math. Debrecen19 (1972) 87-96(in Russian).
[22] Mollov, T., On the Sylow subgroups of the unit groups of the modular group algebras of the abelian \(p\)-groups, C. R. Acad. Bulgar. Sci.25 (1972) 1463-1466(in Russian). · Zbl 0335.20004
[23] Irwin, J. and Richman, F., Direct sums of countable groups and related concepts, J. Algebra2 (1965) 443-450, https://doi.org/10.1016/0021-8693(65)90005-0. · Zbl 0132.27104
[24] Mollov, T., Isotype subgroups and direct products of countable groups in the unit groups of modular group algebras of primary abelian groups, Plovdiv University P. Hilendarski, Bulgaria, Scientific works, Mathematics12 (1974) 91-98(in Russian).
[25] Nachev, N., Invariants of the Sylow \(p\)-subgroup of the unit groups of a commutative group rings of characteristic \(p\), Commun. Algebra23 (1995) 3469-2489, https://doi.org/10.1080/00927879508825355. · Zbl 0828.16037
[26] Mollov, T., Ulm invariants of the Sylow \(p\)-subgroups of the group algebras of the abelian groups over a field of characteristic \(p\), Sixth Congress of the Bulgarian Mathematicians, Varna, Reports Abstracts, Section A \(2 (1977)\) p. 2(in Russian).
[27] Mollov, T., Ulm invariants of the Sylow \(p\)-subgroups of the group algebras of the abelian groups over a field of characteristic \(p\), Pliska2 (1981) 77-82(in Russian). · Zbl 0506.16008
[28] Bovdi, A. and Pataj, Z., On constructing a multiplicative group of a group ring of a \(p\)-group over a ring of characteristic \(p\), Izv. Akad. Nauk BSSR, Ser. Fiz.-Mat. Nauk1 (1978) 5-11(in Russian). · Zbl 0394.16009
[29] Nachev, N. and Mollov, T., Ulm-Kaplansky invariants of the groups of normalized units of the modular group ring of a primary abelian group, Serdica6 (1980) 258-263. · Zbl 0485.20047
[30] Nachev, N., Invariants of the Sylow \(p\)-subgroup of the unit group of commutative group ring of characteristic \(p\), C. R. Acad. Bulgar. Sci.47 (1994) 9-12. · Zbl 0833.16033
[31] Mollov, T. and Nachev, N., Some set theoretic properties of the radical of Baer of commutative rings of prime characteristic, Plovdiv University P. Hilendarski, Bulgaria, Scientific works, Mathematics15 (1977) 13-22(in Russian).
[32] Danchev, P., Units in abelian group rings of prime characteristic, C. R. Acad. Bulgar. Sci.48 (1995) 5-8. · Zbl 0852.16024
[33] Danchev, P., The splitting problem and the direct factor problem in modular abelian group algebras, Math. Balkanica14 (2000) 217-226. · Zbl 1062.20500
[34] Danchev, P., Maximal divisible subgroups in modular group algebras of \(p\)-mixed and \(p\)-splitting abelian Groups, Rad. Mat.13 (2004) 23-32. · Zbl 1086.16017
[35] Mollov, T. and Nachev, N., Unit groups of commutative group rings, Commun. Algebra34 (2006) 3835-3857, https://doi.org/10.1080/00927870600862672. · Zbl 1115.16014
[36] Kuneva, V., Maximal divisible subgroups in modular group algebras of \(p\)-mixed abelian groups, C. R. Acad. Bulgar. Sci.559 (2006) 899-902. · Zbl 1119.16030
[37] Danchev, P., Quasi-completness of Sylow \(p\)-subgroups in group algrbras over special rings, Int. J. Math. Anal.1 (2006) 97-101. · Zbl 1136.16026
[38] Danchev, P., Criteria for unit groups in commutative group rings, Studia Univ. Babes-Bolyai, MathematicaLI (2006) 43-61. · Zbl 1120.16302
[39] Mollov, T., Review of “Danchev P., Quasi-completness of Sylow \(p\)-subgroups in group algrbras over special rings, Int. J. Math. Anal.1 (2006) 97-101”, Zbl 1136.16026. · Zbl 1136.16026
[40] Danchev, P., Trivial units in commutative group algebras, Extracta Math.23 (2008) 49-60. · Zbl 1163.16019
[41] Danchev, P., On the trivial units in finite commutative group rings, Math. Commun.10 (2005) 143-147. · Zbl 1097.16007
[42] Mollov, T., Review of “Danchev P., Trivial units in commutative group algebras, Extracta Math.23 (2008) 49-60”, Zbl 1163.16019. · Zbl 1163.16019
[43] Kuneva, V., Mollov, T. and Nachev, N., Some notes on the unit groups of commutative group algebras, Plovdiv University P. Hilendarski, Bulgaria, Scientific works, Mathematics36 (2009) 67-88. · Zbl 1480.16041
[44] Mollov, T. and Nachev, N., Unit groups of commutative group algebras, Int. Electr. J. Pure Appl. Math.2 (2010) 163-175. · Zbl 1351.16027
[45] Danchev, P., Ulm-Kaplansky invariants for \(S(RG)/ G_p\), Bull. Inst. Math. Acad. Sin.32 (2004) 133-144. · Zbl 1067.16054
[46] Danchev, P., On idempotent units in commutative group rings, An. Univ. Bucuresti Mat.LVIII (2009) 3-8.
[47] Mollov, T., Review of Danchev P., On idempotent units in commutative group rings, An. Univ. Bucuresti Mat.58 (2009) 17-22, Zbl 1163.16019. · Zbl 1188.16031
[48] Danchev, P., Maximal divisible subgroups in modular group rings of \(p\)-mixed abelian groups, Bull. Braz. Math. Soc.41 (2010) 63-72, https://doi.org/10.1007/s00574-010-0003-2. · Zbl 1198.16032
[49] Nezhmetdinov, T., Group of units of finite commutative group rings, Commun. Algebra38 (2010) 4669-4681, https://doi.org/10.1080/00927870903451918. · Zbl 1216.16026
[50] Warfield, R. B. Jr., Classification theorems for \(p\)-groups and modules over a discrete valuation ring, Bull. Amer. Math. Soc.78 (1972) 88-92, https://doi.org/10.1090/s0002-9904-1972-12870-2. · Zbl 0231.13004
[51] Warfield, R. B. Jr., Classification theory of abelian groups. I: Balanced projectives, Trans. Amer. Math. Soc.222 (1976) 33-63, https://doi.org/10.2307/1997657. · Zbl 0358.20065
[52] Mollov, T. and Nachev, N., On the unit groups of commutative modular group algebras of \(KT\)-groups, Commun. Algebra39 (2011) 2299-2312, https://doi.org/10.1080/00927872.2010.488669. · Zbl 1231.16031
[53] Hill, P., Lane, M. and Megibben, C., On the structure of \(p\)-local abelian groups, J. Algebra143 (1991) 29-45, https://doi.org/10.1016/0021-8693(91)90249-8. · Zbl 0752.20027
[54] Danchev, P., Warfield invariants in abelian group rings, Extracta Math.20 (2005) 233-241. · Zbl 1117.16022
[55] Danchev, P., Warfield invariants in commutative group rings, J. Algebra Appl.8 (2009) 829-836, https://doi.org/10.1142/s0219498809003679. · Zbl 1183.16031
[56] Nachev, N., Review of “Danchev P., Warfield invariants in abelian group rings, Extracta Math.20 (2005) 233-241”, Zbl 117.16622. · Zbl 1117.16022
[57] Danchev, P., Warfield invariants in commutative group algebras, J. Algebra Appl.7 (2008) 1-10, https://doi.org/10.1142/s0219498808002886.
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.