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Fixed points and openess. (English) Zbl 0099.10502


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[1] M. Reichbach, Generalizations of the Fundamental Theorem of Algebra, Bull. Res. Council Israel Sect. F 7F (1958), 155 – 164 (1958). · Zbl 0098.30903
[2] M. Reichbach, Some theorems on mappings onto, Pacific J. Math. 10 (1960), 1397 – 1407. · Zbl 0097.31601
[3] J. Schauder, Der Fixpunktsatz in Funktionalräumen, Studia Math. vol. 2 (1930) pp. 171-180. · JFM 56.0355.01
[4] Angus E. Taylor, Introduction to functional analysis, John Wiley & Sons, Inc., New York; Chapman & Hall, Ltd., London, 1958. · Zbl 0081.10202
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