Results 91 to 100 of about 64,232 (230)
Density‐Valued ARMA Models by Spline Mixtures
Journal of Time Series Analysis, EarlyView.ABSTRACT This paper proposes a novel framework for modeling time series of probability density functions by extending autoregressive moving average (ARMA) models to density‐valued data. The method is based on a transformation approach, wherein each density function on a compact domain [0,1]d$$ {\left[0,1\right]}^d $$ is approximated by a B‐spline ...
Yasumasa Matsuda, Rei Iwafuchi
wiley +1 more source
Physical realizations of quantum operations
, 2003 Quantum operations (QO) describe any state change allowed in quantum mechanics, such as the evolution of an open system or the state change due to a measurement. We address the problem of which unitary transformations and which observables can be used to
A. Jamiołkowski +16 more
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Measure‐valued processes for energy markets
Mathematical Finance, Volume 35, Issue 2, Page 520-566, April 2025.Abstract We introduce a framework that allows to employ (non‐negative) measure‐valued processes for energy market modeling, in particular for electricity and gas futures. Interpreting the process' spatial structure as time to maturity, we show how the Heath–Jarrow–Morton approach can be translated to this framework, thus guaranteeing arbitrage free ...
Christa Cuchiero +3 more
wiley +1 more source
Jointly A-hyponormal m-tuple of commuting operators and related results
AIMS MathematicsIn this paper, we aim to investigate the class of jointly hyponormal operators related to a positive operator $ A $ on a complex Hilbert space $ \mathcal{X} $, which is called jointly $ A $-hyponormal. This notion was first introduced by Guesba et al. in
Salma Aljawi +2 more
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Why Are All the Sets All the Sets?
Noûs, EarlyView.ABSTRACT Necessitists about set theory think that the pure sets exists, and are the way they are, as a matter of necessity. They cannot explain why the sets (de rebus) are all the sets. This constitutes the Ur‐Objection against necessitism; it is the primary motivation cited by potentialists about set theory.
Tim Button
wiley +1 more source
Generalization of Gisin’s theorem to quantum fields
New Journal of PhysicsWe generalize Gisin’s theorem on the relation between the entanglement of pure states and Bell non-classicality to the case of mode entanglement of separated groups of modes of quantum fields extending the theorem to cover also states with undefined ...
Konrad Schlichtholz, Marcin Markiewicz
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Failure of the trilinear operator space Grothendieck theorem
Discrete Analysis, 2019 Failure of the trilinear operator space Grothendieck theorem, Discrete Analysis 2019:8, 16 pp. Let $\beta:\ell_\infty^n\times \ell_\infty^n\to\mathbb C$ be a bilinear form.
Jop Briët, Carlos Palazuelos
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Controlled frames in n-Hilbert spaces and their tensor products [PDF]
, 2021 Prasenjit Ghosh, T. K. Samanta
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The transportation of embedded inversion in world Englishes
World Englishes, EarlyView.Abstract The present study uses private correspondence to investigate the use of embedded inversion on both sides of the Atlantic as an illustration of the spread of spoken/conversational features through writing. The paper discusses the use of embedded inversion in Irish English (IrE) and briefly compares its occurrence in other varieties of English ...
Carolina P. Amador‐Moreno
wiley +1 more source
On the relation between states and maps in infinite dimensions
, 2007 Relations between states and maps, which are known for quantum systems in finite-dimensional Hilbert spaces, are formulated rigorously in geometrical terms with no use of coordinate (matrix) interpretation.
Grabowski, Janusz +2 more
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