Search Results - "Sjögren, Peter"

Maximal operators of exotic and non-exotic Laguerre and other semigroups associated with classical orthogonal expansions by Nowak, Adam, Sjögren, Peter, Szarek, Tomasz Z.

“…Classical settings of discrete and continuous orthogonal expansions, like those of Laguerre, Bessel and Jacobi, are associated with second order differential…”
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On the maximal operator of a general Ornstein–Uhlenbeck semigroup by Casarino, Valentina, Ciatti, Paolo, Sjögren, Peter

“…If Q is a real, symmetric and positive definite n × n matrix, and B a real n × n matrix whose eigenvalues have negative real parts, we consider the…”
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On the variation operator for the Ornstein–Uhlenbeck semigroup in dimension one by Casarino, Valentina, Ciatti, Paolo, Sjögren, Peter

“…Consider the variation seminorm of the Ornstein–Uhlenbeck semigroup H t in dimension one, taken with respect to t . We show that this seminorm defines an…”
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On non-centered maximal operators related to a non-doubling and non-radial exponential measure by Nowak, Adam, Sasso, Emanuela, Sjögren, Peter, Stempak, Krzysztof

“…We investigate mapping properties of non-centered Hardy–Littlewood maximal operators related to the exponential measure d μ ( x ) = exp ( - | x 1 | - ⋯ - | x d…”
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Genuinely sharp heat kernel estimates on compact rank-one symmetric spaces, for Jacobi expansions, on a ball and on a simplex by Nowak, Adam, Sjögren, Peter, Szarek, Tomasz Z.

“…We prove genuinely sharp two-sided global estimates for heat kernels on all compact rank-one symmetric spaces. This generalizes the authors’ recent result…”
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Estimates for Operators Related to the Sub-Laplacian with Drift in Heisenberg Groups by Li, Hong-Quan, Sjögren, Peter

“…In the Heisenberg group of dimension 2 n + 1 , we consider the sub-Laplacian with a drift in the horizontal coordinates. There is a related measure for which…”
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ANALYSIS IN THE MULTI-DIMENSIONAL BALL by Sjögren, Peter, Szarek, Tomasz Z.

“…We study the heat semigroup maximal operator associated with a well-known orthonormal system in the $d$ -dimensional ball. The corresponding heat kernel is…”
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Calderón-Zygmund Operators Related to Jacobi Expansions by Nowak, Adam, Sjögren, Peter

“…We study several fundamental operators in harmonic analysis related to Jacobi expansions, including Riesz transforms, imaginary powers of the Jacobi operator,…”
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On the orthogonality of generalized eigenspaces for the Ornstein–Uhlenbeck operator by Casarino, Valentina, Ciatti, Paolo, Sjögren, Peter

“…We study the orthogonality of the generalized eigenspaces of an Ornstein–Uhlenbeck operator L in R N , with drift given by a real matrix B whose eigenvalues…”
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On the H^1--L^1 boundedness of operators by Stefano Meda, Peter Sjögren, Maria Vallarino

“…We prove that if q is in (1,\infty ), Y is a Banach space, and T is a linear operator defined on the space of finite linear combinations of (1,q)-atoms in…”
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A holistic model for inter-plant knowledge transfer within an international manufacturing network by Noruzi, Farhad, Stenholm, Daniel, Sjögren, Peter, Bergsjö, Dag

“…Purpose This paper aims to provide a holistic view to support the choice of appropriate strategy for conducting a knowledge transfer (KT) project in an…”
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Analysis Related to All Admissible Type Parameters in the Jacobi Setting by Nowak, Adam, Sjögren, Peter, Szarek, Tomasz Z.

“…We derive an integral representation for the Jacobi–Poisson kernel valid for all admissible type parameters α , β in the context of Jacobi expansions. This…”
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Weak Type (1,1) Bounds for Some Operators Related to the Laplacian with Drift on Real Hyperbolic Spaces by Li, Hong-Quan, Sjögren, Peter

“…The setting of this work is the n -dimensional hyperbolic space R + × R n - 1 , where the Laplacian is given a drift in the R + direction. We consider the…”
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Opportunity discovery in initiated and emergent change requests by Sjögren, Peter, Fagerström, Björn, Kurdve, Martin, Lechler, Thomas

“…When a change request is raised in an engineering project an ad hoc team often forms to manage the request. Prior research shows that practitioners often view…”
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Managing emergent changes: ad hoc teams’ praxis and practices by Sjögren, Peter, Fagerström, Björn, Kurdve, Martin, Callavik, Magnus

“…Purpose The purpose of this paper is to explore how emergent changes are handled in research and development (R&D) projects. R&D projects’ business potential…”
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A maximal function characterization of the Hardy space for the Gauss measure by Mauceri, Giancarlo, Meda, Stefano, Sjögren, Peter

“…An atomic Hardy space H1(γ) associated to the Gauss measure γ in ℝn has been introduced by the first two authors. We first prove that it is equivalent to use…”
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Weak type (1, 1) of some operators for the Laplacian with drift by Li, Hong-Quan, Sjögren, Peter, Wu, Yurong

“…Let v = ( v 1 , … , v n ) be a vector in R n \ { 0 } . Consider the Laplacian on R n with drift Δ v = ∑ i = 1 n ( ∂ 2 ∂ x i 2 + 2 v i ∂ ∂ x i ) and the measure…”
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Bounds for Maximal Functions Associated with Rotational Invariant Measures in High Dimensions by Criado, Alberto, Sjögren, Peter

“…In recent articles (A. Criado in Proc. R. Soc. Edinb. Sect. A 140(3):541–552, 2010 ; Aldaz and Pérez Lázaro in Positivity 15:199–213, 2011 ) it was proved that…”
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Riesz transforms of a general Ornstein–Uhlenbeck semigroup by Casarino, Valentina, Ciatti, Paolo, Sjögren, Peter

“…We consider Riesz transforms of any order associated to an Ornstein–Uhlenbeck operator with covariance given by a real, symmetric and positive definite matrix,…”
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The multi-dimensional pencil phenomenon for Laguerre heat-diffusion maximal operators by Nowak, Adam, Sjögren, Peter

“…We investigate in detail the mapping properties of the maximal operator associated with the heat-diffusion semigroup corresponding to expansions with respect…”
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