Results 11 to 20 of about 1,149,485 (65)

Optimal control of stochastic partial differential equations in Banach spaces [PDF]

open access: yes, 2010
In this thesis we study optimal control problems in Banach spaces for stochastic partial differential equations. We investigate two different approaches.
Serrano Perdomo, Rafael Antonio
core   +7 more sources

An amalgamation of the Banach spaces associated with James and Schreier, Part I : Banach-space structure. [PDF]

open access: yes, 2010
We create a new family of Banach spaces, the James-Schreier spaces, by amalgamating two important classical Banach spaces: James' quasi-reflexive Banach space on the one hand and Schreier's Banach space giving a counterexample to the Banach-Saks property
Alistair Bird   +3 more
core   +4 more sources

Reverses of the Triangle Inequality in Banach Spaces [PDF]

open access: yes, 2005
Recent reverses for the discrete generalised triangle inequality and its continuous version for vector-valued integrals in Banach spaces are surveyed. New results are also obtained.
Dragomir, Sever S
core   +7 more sources

Maximal ideals in the algebra of operators on certain Banach spaces. [PDF]

open access: yes, 2002
For a Banach space $\mathfrak{X}$, let $\mathcal{B}(\mathfrak{X})$ denote the Banach algebra of all continuous linear operators on $\mathfrak{X}$. First, we study the lattice of closed ideals in $\mathcal{B}(\mathfrak{J}_p)$, where $1 < p < \infty$ and $\
Laustsen, Niels J.
core   +4 more sources

Semigroup wellposedness and asymptotic stability of a compressible Oseen–structure interaction via a pointwise resolvent criterion

open access: yesMathematische Nachrichten, Volume 296, Issue 3, Page 1135-1155, March 2023., 2023
Abstract In this study, we consider the Oseen structure of the linearization of a compressible fluid–structure interaction (FSI) system for which the interaction interface is under the effect of material derivative term. The flow linearization is taken with respect to an arbitrary, variable ambient vector field.
Pelin G. Geredeli
wiley   +1 more source

Several Inequalities of Frechet Spaces [PDF]

open access: yes, 2005
Several inequalities of Frechet spaces are given in this paper, which can be regarded as the Frechet spaces versions of the well-known polarization identity occurring in Hilbert spaces. Our results generalize many inequalities in Banach spaces.
Shi, Chaofeng
core   +6 more sources

Nonlocal homogenisation theory for curl‐div‐systems

open access: yesMathematische Nachrichten, Volume 295, Issue 5, Page 950-969, May 2022., 2022
Abstract We study the curl‐div‐system with variable coefficients and a nonlocal homogenisation problem associated with it. Using, in part refining, techniques from nonlocal H‐convergence for closed Hilbert complexes, we define the appropriate topology for possibly nonlocal and non‐periodic coefficients in curl‐div systems to model highly oscillatory ...
Serge Nicaise, Marcus Waurick
wiley   +1 more source

Div–curl problems and H1‐regular stream functions in 3D Lipschitz domains

open access: yesMathematical Methods in the Applied Sciences, Volume 45, Issue 3, Page 1097-1117, February 2022., 2022
We consider the problem of recovering the divergence‐free velocity field U ∈ L2(Ω) of a given vorticity F=curlU on a bounded Lipschitz domain Ω⊂ℝ3. To that end, we solve the ‘div–curl problem’ for a given F ∈ H−1(Ω). The solution is expressed in terms of a vector potential (or stream function) A ∈ H1(Ω) such that U=curlA. After discussing existence and
Matthias Kirchhart, Erick Schulz
wiley   +1 more source

Robust Optimization of Dynamic Characteristics of Mechanical Structure Combined with Multivariable Predictive Compensation

open access: yesMobile Information Systems, Volume 2022, Issue 1, 2022., 2022
Due to the influence of many factors such as machining and working environment, the robot kinematics model has errors, which leads to the inaccuracy of the actual position and pose. Therefore, in order to solve this problem, this paper proposes a method based on the genetic algorithm to directly modify the rotation variables of the manipulator joint to
Li Zhang, Hye-jin Kim
wiley   +1 more source

Almost uniform domains and Poincaré inequalities

open access: yesTransactions of the London Mathematical Society, Volume 8, Issue 1, Page 243-298, December 2021., 2021
Abstract Here we show existence of many subsets of Euclidean spaces that, despite having empty interior, still support Poincaré inequalities with respect to the restricted Lebesgue measure. Most importantly, despite the explicit constructions in our proofs, our methods do not depend on any rectilinear or self‐similar structure of the underlying space ...
Sylvester Eriksson‐Bique, Jasun Gong
wiley   +1 more source

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