Kaplansky test problem forR-modules
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Abstract
We prove that every ringR without strong decomposition theorem has a strong non-decomposition theorem. We use diamonds (but this will be eliminated in a subsequent paper).
Keywords
Abelian Group Direct Summand Abelian Subgroup Endomorphism Ring Free Abelian Group
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References
- [C]A. L. S. Corner,Every countable reduced torsion-free ring is an endomorphism ring, Proc. Lond. Math. Soc.13 (1963), 687–710.MATHCrossRefMathSciNetGoogle Scholar
- [C2]A. L. S. Corner,Finite automorphism groups in torsion free abelian groups, to appear.Google Scholar
- [CG]A. L. S. Corner and R. Gobel,Prescribing endomorphism algebras, a unified treatment, Proc. Lond. Math. Soc.50 (1985), 447–479.MATHCrossRefMathSciNetGoogle Scholar
- [D1]M. Dugas,Fast free abelsche Gruppen mit endomorphismering Z, J. Algebra7 (1981), 314–321.CrossRefMathSciNetGoogle Scholar
- [DG1]M. Dugas and R. Gobel,Every cotorsion-free ring is an endomorphism ring, Proc. Lond. Math. Soc.45 (1982), 319–336.MATHCrossRefMathSciNetGoogle Scholar
- [DG2]M. Dugas and R. Gobel,Every cotorsion-free algebra is an endomorphism algebra, Math. Z.181 (1982), 451–470.MATHCrossRefMathSciNetGoogle Scholar
- [DG3]M. Dugas and R. Gobel,On endomorphism rings of primary abelian groups, Math. Ann.261 (1982), 359–385.MATHCrossRefMathSciNetGoogle Scholar
- [DSh325]M. Dugas and S. Shelah,E-Transitive groups in L, inResultate der Mathematik; to appear inProc. ’87 Conference on Abelian Groups in Perth, Australia, Contemp. Math.87 (1989).Google Scholar
- [EM]P. Eklof and A. H. Mekler,On constructing indecomposable groups in L, J. Algebra49 (1977), 96–103.MATHCrossRefMathSciNetGoogle Scholar
- [EM1]P. Eklof and A. H. Mekler,Almost Free Modules: Set Theoretic Methods, North-Holland Mathematical Library, North-Holland, Amsterdam, 1990.MATHGoogle Scholar
- [Fu]L. Fuchs,Abelian Groups, I,II, Academic Press, New York, 1970, 1973.Google Scholar
- [Gr]S. Garavaglia,Decomposition of totally transcendental modules, J. Symb. Logic45 (1980), 155–164.MATHCrossRefMathSciNetGoogle Scholar
- [G1]R. Gobel,Dartstellung von Ringen als Endomorphismeringe, Arch. Math (Basel)35 (1980), 338–350.MathSciNetGoogle Scholar
- [GSh190]R. Gobel and S. Shelah,Semi-rigid classes of co-torsion free abelian groups, J. Algebra93 (1985), 136–150.CrossRefMathSciNetGoogle Scholar
- [GSh219]R. Gobel and S. Shelah,Modules over arbitrary domains, Math. Z. 188 (1985), 325–337.CrossRefMathSciNetGoogle Scholar
- [K]I. Kaplansky,Infinite Abelian Groups, Ann Arbor, 1954.Google Scholar
- [MgSh204]M. Magidor and S. Shelah,When does almost free imply free? (For groups, transversals, etc.), J. Am. Math. Soc., to appear.Google Scholar
- [P1]M. Prest,Model theory and modules, London Math. Soc. Lect. Note Ser.130 (1988).Google Scholar
- [P2]M. Prest,Rings of finite representation type and modules of finite Morley rank, J. Algebra88 (1984), 502–533.MATHCrossRefMathSciNetGoogle Scholar
- [Sh-e]S. Shelah,Universal Classes (new version, revised III and IV, V and VI exists, VII and VIII preprint).Google Scholar
- [Sh44]S. Shelah,Infinite abelian groups, Whitehead problem and some constructions, Isr. J. Math.18 (1974), 243–256.MATHCrossRefGoogle Scholar
- [Sh45]S. Shelah,Existence of rigid-like families of abelian p-groups, inModel Theory and Algebra. A memorial tribute to A. Robinson (D. Saracino and V. Weispfenning, eds.), Lecture Notes in Math.498, Springer-Verlag, Berlin, 1975, pp. 385–402.CrossRefGoogle Scholar
- [Sh54]S. Shelah,The lazy model theorist’s guide to stability, Logique et Analyse, 18 Anne, Vol. 71–72 (1975), 241–308.Google Scholar
- [Sh54a]S. Shelah,The lazy model theorist guide to stability, inSix Days of Model Theory (P. Henrard Castella, ed.), Albeuve, 1977, pp. 9–76.Google Scholar
- [Shl40]S. Shelah,On endo-rigid strongly ℵ 1-free abelian groups in ℵ1,Isr. J. Math.40 (1981), 291–295.MATHCrossRefGoogle Scholar
- [Sh172]S. Shelah,A combinatorial principle and endomorphism rings of p-groups, Proc. 1980/1 Jerusalem Model Theory Years, Isr. J. Math.49 (1984), 239–257.MATHCrossRefGoogle Scholar
- [Sh227]S. Shelah,A combinatorial principle and endomorphism rings of abelian groups II, inProc. Conference on Abelian Groups, Undine, April 9–14, 1984 (R. Gobel, C. Metelli, A. Orsatti and L. Solce, eds.), [BSF], CISM Courses and Lecture No. 287, International Centre for Mechanical Sciences, Abelian Groups and Modules, pp. 27–86.Google Scholar
- [Sh300]S. Shelah,Universal classes, Ch. I–IV,Proc. U.S.-Israel Conference on Classification Theory (J. Baldwin, ed.), Lecture Notes in Math.1292, Springer-Verlag, Berlin, 1987, pp. 264–418.Google Scholar
- [Sh421]S. Shelah,Kaplansky Test Problem for R-modules in ZFC, a preprint.Google Scholar
- [Z]M. Ziegler,Model theory of modules, Ann. Pure Appl. Logic26 (1984), 149–213.MATHCrossRefMathSciNetGoogle Scholar
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