On a fixed-point theorem of Banach type
Jochen Reinermann (1970)
Annales Polonici Mathematici
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Displaying similar documents to “On the disc-convexity of complex Banach manifolds”
On a fixed-point theorem of Banach type
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Stanisław Szufla (1977)
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2000 Mathematics Subject Classification: Primary: 46B20. Secondary: 46H99, 47A12. We estimate the (midpoint) modulus of convexity at the unit 1 of a Banach algebra A showing that inf {max±||1 ± x|| − 1 : x ∈ A, ||x||=ε} ≥ (π/4e)ε²+o(ε²) as ε → 0. We also give a characterization of two-dimensional subspaces of Banach algebras containing the identity in terms of polynomial inequalities.
Rolle's theorem and negligibility of points in infinite dimensional Banach spaces.
D. Azagra, J. Gómez, J. A. Jaramillo (1996)
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A new proof of a Lemma by Phelps.
Cardwell, Antonia E. (2006)
International Journal of Mathematics and Mathematical Sciences
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