Results 11 to 20 of about 1,990,830 (333)
Antioxidants, 2021 Sustainability, circular economy and alternative production systems are urgent imperatives for humanity and animal husbandry. Unless wasted, agri-food by-products can offer a promising source of high value.
Stefanos S. Andreadis +9 more
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Essentiality for Mönch type maps [PDF]
Proceedings of the American Mathematical Society, 2000 A new fixed point theorem for Mönch maps on locally convex spaces is given. In addition, a continuation theorem for Mönch maps is presented.
Agarwal, R.P., O'Regan, D.
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Mathematics, 2020 A simple theorem is presented that automatically generates the topological transversality theorem and Leray−Schauder alternatives for weakly upper semicontinuous, weakly compact maps. An application is given to illustrate our results.
Donal O’Regan
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Essential mappings and transfinite dimension [PDF]
Fundamenta Mathematicae, 1985 If \(\alpha\) is a countable ordinal, \(J^{\alpha}\) is \textit{D. W. Henderson}'s \(\alpha\)-dimensional absolute retract [ibid. 63, 167-173 (1968; Zbl 0167.513)] and Ind \(X\geq \alpha\), is there an essential \(f: X\to J^{\alpha}?\) The authors answer this question in the affirmative if \(\alpha =\omega\) and X is normal and in the negative if ...
Borst, P., Dijkstra, J. J.
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Stochastically stable globally coupled maps with bistable thermodynamic limit [PDF]
, 2008 We study systems of globally coupled interval maps, where the identical individual maps have two expanding, fractional linear, onto branches, and where the coupling is introduced via a parameter - common to all individual maps - that depends in an ...
Bardet, Jean-Baptiste +2 more
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Essential maps and manifolds [PDF]
Proceedings of the American Mathematical Society, 1992 Let ( M , ∂ M ) (M,\partial M) be a compact n n -manifold with boundary, orientable over a field K K with characteristic q q . For f : ( Y , ∂ Y ) → ( M ,
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Essentially spectrally bounded linear maps [PDF]
Proceedings of the American Mathematical Society, 2009 Let \(H\) be an infinite-dimensional complex Hilbert space. Denote by \({\mathcal L}(H)\) the algebra of all bounded linear operators on \(H\), by \({\mathcal K}(H)\) the ideal of compact operators, and by \({\mathcal C}(H)\) the Calkin algebra. Let \(\pi:{\mathcal L}(H)\to {\mathcal C}(H)\) be the quotient map and let \(r_e(T)\) denote the essential ...
Bendaoud, M., Bourhim, A.
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Fixed point theory on extension-type spaces and essential maps on topological spaces
Fixed Point Theory and Applications, 2004 We present several new fixed point results for admissible self-maps in extension-type spaces. We also discuss a continuation-type theorem for maps between topological spaces.
Donal O'Regan
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The Topological Transversality Theorem for Multivalued Maps with Continuous Selections
Mathematics, 2019 This paper considers a topological transversality theorem for multivalued maps with continuous, compact selections. Basically, this says, if we have two maps F and G with continuous compact selections and F ≅ G, then one map being essential ...
Donal O’Regan
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Essential singularities of quasimeromorphic mappings.
MATHEMATICA SCANDINAVICA, 1993 Suppose that \(f:\mathbb{B}^ n-\{0\} \to S^ n\) is a quasi-meromorphic mapping, where \(B^ n\) is the open unit ball in euclidean \(n\)-space and \(S^ n\) the unit sphere in euclidean \((n+1)\)-space. If 0 is an essential singularity then in every deleted neighbourhood of 0 there is an essential round sphere on which \(f\) assumes antipodal values ...
Martin, G.J., Gauld, D.B.
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