Results 31 to 40 of about 1,495,717 (183)
Minimal Gevrey Regularity for Hörmander Operators
International Mathematics Research Notices, 2023 Abstract We prove a minimal Gevrey regularity theorem for Hörmander’s sum of squares type operators ( 1.1), improving the result of Derridj and Zuily [ 10]. The Gevrey index given here is optimal, in the sense that there are operators of this type that just attain that regularity and not any better.
Bove, Antonio, Mughetti, Marco
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The nonexistence of regularization operators
Journal of Mathematical Analysis and Applications, 2003 With references to applications in physics the author discusses the well known problem of regularization of generalized functions. As is known, there exist various procedures to regularize some concrete classes of generalized functions. For generalized functions on the real line the author shows that there cannot exist a unique procedure which provides
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Operations preserving regular languages
Theoretical Computer Science, 2006 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jean Berstel +4 more
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On regular operators on Banach lattices
Acta et commentationes: Ştiinţe Exacte şi ale Naturii, 2023 Let $E$ and $F$ be Banach lattices and $X$ and $Y$ be Banach spaces. A linear operator $T: E \rightarrow F$ is called regular if it is the difference of two positive operators. $L_{r}(E,F)$ denotes the vector space of all regular operators from $E$ into $F$.
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Deterministic automata for extended regular expressions
Open Computer Science, 2017 In this work we present the algorithms to produce deterministic finite automaton (DFA) for extended operators in regular expressions like intersection, subtraction and complement.
Syzdykov Mirzakhmet
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Axioms, 2021 For L a complete co-residuated lattice and R an L-fuzzy relation, an L-fuzzy upper approximation operator based on co-implication adjoint with L is constructed and discussed.
Qiu Jin, Lingqiang Li
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Regularity for Eigenfunctions of Schrödinger Operators [PDF]
Letters in Mathematical Physics, 2012 We prove a regularity result in weighted Sobolev spaces (or Babuska--Kondratiev spaces) for the eigenfunctions of a Schrödinger operator. More precisely, let K_{a}^{m}(\mathbb{R}^{3N}) be the weighted Sobolev space obtained by blowing up the set of singular points of the Coulomb type potential V(x) = \sum_{1 \le j \le N} \frac{b_j}{|x_j|} + \sum_{1 \le
Nistor, Victor +2 more
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P*-closure operator and p*-regularity in fuzzy setting [PDF]
Mathematica Moravica, 2015 In this paper a new type of fuzzy regularity, viz. fuzzy p*- regularity has been introduced and studied by a newly defined closure operator, viz., fuzzy p*-closure operator.
Bhattacharyya Anjana
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Univalence Conditions Related to a General Integral Operator
Abstract and Applied Analysis, 2012 We consider a general integral operator based on two types of analytic functions, namely, regular functions and, respectively, functions having a positive real part. Some univalence conditions for this integral operator are obtained.
Nicoleta Breaz, Virgil Pescar
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Some properties of a kind of generalized Teodorescu operator in Clifford analysis
Journal of Inequalities and Applications, 2016 First, a kind of generalized Teodorescu operator which is related to the k-regular functions are defined. Then the boundedness and the Hölder continuity of the generalized Teodorescu operator are discussed.
Liping Wang
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