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Verallgemeinerungen eines Satzes von S. Piccard. (German) Zbl 0312.54018


MSC:

54C10 Special maps on topological spaces (open, closed, perfect, etc.)
54B10 Product spaces in general topology
54C50 Topology of special sets defined by functions

References:

[1] DUBIKAJTIS,L., FERENS,C., GER,R., KUCZMA,M.: On Mikusinski’s functional equation, Ann. Polon. Math.28. 39-47 (1973). · Zbl 0251.39008
[2] HILLE,E., PHILLIPS,R.S.: Functional analysis and semi-groups. Amer. Math. Soc. Coll. Publ. Vol. 31. Providence: Amer. Math. Soc. 1957. · Zbl 0078.10004
[3] HUSAIN,T.: Introduction to topological groups. Philadelphia-London: W.B.Saunders 1966. · Zbl 0136.29402
[4] KOMINEK,Z.: On the sum and difference of two sets i topological vector spaces. Fund.Math.71. 165-169 (1971). · Zbl 0214.37403
[5] KOMINEK,Z.: Some generalization of the theorem of S. Piccard. Prace Mat.4. 31-33 (1973). · Zbl 0268.26003
[6] KUCZMA,M.E., KUCZMA,M.: An elementary proof and an extension of a theorem of Steinhaus. Glasnik Mat.6(26). 11-18 (1971). · Zbl 0218.28001
[7] KURATOWSKI,K.: Topology. Vol.1. New York-London-Warszawa: Academic Press and PWN 1966. · Zbl 0158.40901
[8] McSHANE,E.J.: Images of sets satisfying the condition of Baire. Ann. of Math.51. 380-386 (1950). · Zbl 0036.16701 · doi:10.2307/1969330
[9] MEHDI,M.R.: On convex functions. J. London Math. Soc.39. 321-326 (1964). · Zbl 0125.06304 · doi:10.1112/jlms/s1-39.1.321
[10] PAGANONI,L.: Una estensione di un theorema di Steinhaus. Ist. Lombardo Accad.Sci.Lett.Rend.A.108. 262-273 (1974). · Zbl 0314.28002
[11] PETTIS,B.J.: Remarks on a theorem of E.J.McShane. Proc. Amer. Math. Soc.2. 166-171 (1951). · Zbl 0043.05502 · doi:10.1090/S0002-9939-1951-0048012-3
[12] PICCARD,S.: Sur les ensembles de distances des ensembles de points d’un espace euclidien. Mém. Univ. Neuchâtel. Vol.13. Secrétariat de l’université Neuchâtel 1939. · JFM 65.1170.03
[13] SANDER,W.: Über den Kern des Produkts zweier Teilmengen einer topologischen Gruppe. Dissertation. Braunschweig 1974.
[14] STEINHAUS,H.: Sur les distances des points des ensembles de mesure positive. Fund. Math.1. 93-104 (1920). · JFM 47.0179.02
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