On elementary maps
Jerzy Dydak (1974)
Colloquium Mathematicae
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Jerzy Dydak (1974)
Colloquium Mathematicae
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F. Balibrea, C. La Paz (1997)
Annales Polonici Mathematici
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One-dimensional turbulent maps can be characterized via their ω-limit sets [1]. We give a direct proof of this characterization and get stronger results, which allows us to obtain some other results on ω-limit sets, which previously were difficult to prove.
Lluis Alsedà, Jaume Llibre (1989)
Banach Center Publications
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Cowen, Robert (2001)
Southwest Journal of Pure and Applied Mathematics [electronic only]
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Jingyal Pak (1978)
Colloquium Mathematicae
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Władysław A. Majewski, Marcin Marciniak (2007)
Banach Center Publications
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The structure of the set of positive unital maps between M₂(ℂ) and Mₙ(ℂ) (n ≥ 3) is investigated. We proceed with the study of the "quantized" Choi matrix thus extending the methods of our previous paper [MM2]. In particular, we examine the quantized version of Størmer's extremality condition. Maps fulfilling this condition are characterized. To illustrate our approach, a careful analysis of Tang's maps is given.
Mirosław Ślosarski (2019)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
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In this article, we define multi-invertible, multivalued maps. These mappings are a natural generalization of r-maps (in particular, the singlevalued invertible maps). They have many interesting properties and applications. In this article, the multi-invertible maps are applied to the construction of morphisms and to the theory of coincidence.
Ivar Massabò, Alfonso Vignoli (1989)
Colloquium Mathematicae
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Amerik, Ekaterina (1997)
Documenta Mathematica
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Jesús Araujo, Krzysztof Jarosz (2003)
Studia Mathematica
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We prove that a biseparating map between spaces of vector-valued continuous functions is usually automatically continuous. However, we also discuss special cases when this is not true.
Jerzy Krzempek (2004)
Fundamenta Mathematicae
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It is shown that for every at most k-to-one closed continuous map f from a non-empty n-dimensional metric space X, there exists a closed continuous map g from a zero-dimensional metric space onto X such that the composition f∘g is an at most (n+k)-to-one map. This implies that f is a composition of n+k-1 simple ( = at most two-to-one) closed continuous maps. Stronger conclusions are obtained for maps from Anderson-Choquet spaces and ones that satisfy W. Hurewicz's condition (α). The...
O'Regan, D. (1999)
Zeitschrift für Analysis und ihre Anwendungen
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A. Błaszczyk, J. Mioduszewski (1971)
Colloquium Mathematicae
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El Marraki, Mohamed, Zvonkin, Alexander (1995)
Séminaire Lotharingien de Combinatoire [electronic only]
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Udrişte, Constantin (2001)
Balkan Journal of Geometry and its Applications (BJGA)
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Liskovets, Valery A. (2004)
The Electronic Journal of Combinatorics [electronic only]
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Ernst Dieterich, Lars Lindberg (2003)
Colloquium Mathematicae
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Our article contributes to the classification of dissident maps on ℝ ⁷, which in turn contributes to the classification of 8-dimensional real division algebras. We study two large classes of dissident maps on ℝ ⁷. The first class is formed by all composed dissident maps, obtained from a vector product on ℝ ⁷ by composition with a definite endomorphism. The second class is formed by all doubled dissident maps, obtained as the purely imaginary parts of the structures...
Andrew D. Barwell, Chris Good, Piotr Oprocha (2012)
Fundamenta Mathematicae
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We address various notions of shadowing and expansivity for continuous maps restricted to a proper subset of their domain. We prove new equivalences of shadowing and expansive properties, we demonstrate under what conditions certain expanding maps have shadowing, and generalize some known results in this area. We also investigate the impact of our theory on maps of the interval.
Paulette Libermann (2003)
Banach Center Publications
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Władysław A. Majewski, Marcin Marciniak (2006)
Banach Center Publications
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A map φ: Mₘ(ℂ) → Mₙ(ℂ) is decomposable if it is of the form φ = φ₁ + φ₂ where φ₁ is a CP map while φ₂ is a co-CP map. It is known that if m = n = 2 then every positive map is decomposable. Given an extremal unital positive map φ: M₂(ℂ) → M₂(ℂ) we construct concrete maps (not necessarily unital) φ₁ and φ₂ which give a decomposition of φ. We also show that in most cases this decomposition is unique.