Hostname: page-component-77c89778f8-rkxrd Total loading time: 0 Render date: 2024-07-18T12:32:39.405Z Has data issue: false hasContentIssue false

Free Abelian topological groups and the Pontryagin-Van Kampen duality

Published online by Cambridge University Press:  17 April 2009

Vladimir Pestov
Affiliation:
Department of Mathematics, Victoria University of Wellington, Wellington, New Zealand, e-mail: vladimir.pestov@vuw.ac.nz
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We study the class of Tychonoff topological spaces such that the free Abelian topological group A(X) is reflexive (satisfies the Pontryagin-van Kampen duality). Every such X must be totally path-disconnected and (if it is pseudocompact) must have a trivial first cohomotopy group π1(X). If X is a strongly zero-dimensional space which is either metrisable or compact, then A(X) is reflexive.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1995

References

[1]Arhangel'skii˘, A.V., ‘Relations among invariants of topological groups and their subspaces’, Russian Math. Surveys 35 (1980), 123.CrossRefGoogle Scholar
[2]Arhangel'skii˘, A.V., ‘Linear homeomorphisms of function spaces’, Soviet Math. Dokl. 25 (1982), 852855.Google Scholar
[3]Banaczcyk, W., Additive subgroups of topological vector spaces, Lecture Notes in Mathematics 1466 (Springer-Verlag, Berlin, Heidelberg, New York, 1991).CrossRefGoogle Scholar
[4]Blasco, J.L., ‘On μ-spaces and kR-spaces’, Proc. Amer. Math. Soc. 67 (1977), 179186.Google Scholar
[5]Engelking, R., General topology (PWN, Warczawa, 1977).Google Scholar
[6]Flood, J., Free topological vector spaces, (Ph.D. thesis) (Australian National University, Canberra, 1975).Google Scholar
[7]Flood, J., Free locally convex spaces, Dissert. Math. CCXXI (PWN, Warsczawa, 1984).Google Scholar
[8]Fuks, D.B. and Rokhlin, V.A., Beginner's Course in Topology: Geometric Chapters, (translated from the Russian by Iacob, A.) (Springer-Verlag, Berlin, Heidelberg, New York, 1984).CrossRefGoogle Scholar
[9]Gelbaum, B.R., ‘Free topological groups’, Proc. Amer. Math. Soc. 12 (1961), 737743.CrossRefGoogle Scholar
[10]Hewitt, E. and Ross, K.A., Abstract harmonic analysis. I, (second edition) (Springer-Verlag, Berlin, Heidelberg, New York, 1979).CrossRefGoogle Scholar
[11]Hu, S.-T., Homotopy theory, Pure and Applied Mathematics, 8 (Academic Press, New York, London, 1959).Google Scholar
[12]Kaplan, S., ‘Extensions of the Pontryagin duality, I. Infinite products’, Duke Math. J. 15 (1948), 649658.CrossRefGoogle Scholar
[13]Kirillov, A.A. and Gvishiani, A.D., Theorems and problems in functional analysis, (translated from Russian by McFaden, Harold H.) (Springer-Verlag, Berlin, Heidelberg, New York, 1982).CrossRefGoogle Scholar
[14]Markov, A.A., ‘Three papers on topological groups’, Amer. Math. Soc. Transl. 30 (1950), 120 pp.Google Scholar
[15]Martin-Peinador, E., ‘A reflexive admissible topological group must be locally compact’, Proc. Amer. Math. Soc. (to appear).Google Scholar
[16]Morris, S.A., Pontryagin duality and the structure of locally compact Abelian groups (Cambridge University Press, Cambridge, London, New York, Melbourne, 1977).CrossRefGoogle Scholar
[17]Morris, S.A., ‘Free Abelian topological groups’, in Categorical Topology, Proc. Conference Toledo, Ohio, 1983 (Heldermann-Verlag, 1984), pp. 375391.Google Scholar
[18]Nickolas, P., ‘Reflexivity of topological groups’, Proc. Amer. Math. Soc. 65 (1977), 137141.CrossRefGoogle Scholar
[19]Noble, N., ‘k-Groups and duality’, Trans. Amer. Math. Soc. 151 (1970), 551561.Google Scholar
[20]Nummela, E., ‘The completion of a topological group’, Bull. Austral. Math. Soc. 21 (1980), 407417.CrossRefGoogle Scholar
[21]Pestov, V., ‘Some properties of free topological groups’, Moscow Univ. Math. Bull. 37 (1982), 4649.Google Scholar
[22]Pestov, V., ‘Free topological Abelian groups and the Pontryagin duality’, Moscow Univ. Math. Bull. 41 (1986), 14.Google Scholar
[23]Pestov, V., ‘Universal arrows to forgetful functors from categories of topological algebra’, Bull. Austral. Math. Soc. 48 (1993), 209249.CrossRefGoogle Scholar
[24]Rai˘kov, D.A., ‘Harmonic analysis on commutative groups with Haar measure and the theory of characters’, (in Russian), Trudy Mat. Inst. Steklov 14 (1945), 186.Google Scholar
[25]Ra˘kov, D.A., ‘On the completion of topological groups’, (in Russian), Izv. Akad. Nauk SSSR. Ser. Mat. 10 (1946), 513528.Google Scholar
[26]Ra˘kov, D.A., ‘Free locally convex spaces for uniform spaces’, (in Russian), Mat. Sb. (N.S.) 63 (1964), 582590.Google Scholar
[27]Remus, D. and Trigos-Arrieta, F.J., ‘Abelian groups which satisfy Pontryagin duality need not respect compactness’, Proc. Amer. Math. Soc. 117 (1993), 11951200.CrossRefGoogle Scholar
[28]Smith, M., ‘The Pontryagin duality theorem in linear spaces’, Ann. of Math. 56 (1952), 248253.CrossRefGoogle Scholar
[29]Tkachenko, M.G., ‘On completeness of free Abelian topological groups’, Soviet Math. Dokl. 27 (1983), 341345.Google Scholar
[30]Uspenskiiˇ, V.V., ‘On the topology of free locally convex space’, Sov. Math. Dokl. 27 (1983), 781785.Google Scholar
[31]Wheeler, R.F., ‘Weak and pointwise compactness in the space of bounded continuous functions’, Trans. Amer. Math. Soc. 266 (1981), 515530.CrossRefGoogle Scholar