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goodair d stochastic calculus infinite dimensions spdes 2024

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Textbook in PDF format Introducing a groundbreaking framework for stochastic partial differential equations (SPDEs), this work presents three significant advancements over the traditional variational approach. Firstly, Stratonovich SPDEs are explicitly addressed. Widely used in physics, Stratonovich SPDEs have typically been converted to Ito form for mathematical treatment. While this conversion is understood heuristically, a comprehensive treatment in infinite dimensions has been lacking, primarily due to insufficient rigorous results on martingale properties. Secondly, the framework incorporates differential noise, assuming the noise operator is only bounded from a smaller Hilbert space into a larger one, rather than within the same space. This necessitates additional regularity in the Ito form to solve the original Stratonovich SPDE. This aspect has been largely overlooked, despite the increasing popularity of gradient-dependent Stratonovich noise in fluid dynamics and regularisation by noise studies. Lastly, the framework departs from the explicit duality structure (Gelfand Triple), which is typically expected in the study of analytically strong solutions. This extension builds on the classical variational framework established by Röckner and Pardoux, advancing it in all three key aspects. Explore this innovative approach that not only addresses existing challenges but also opens new avenues for research and application in SPDEs. Preface Acknowledgements Introduction Motivation and Description of the Brief Notation Stochastic Calculus in Infinite Dimensions A Classical Construction for Hilbert Space Valued Processes Martingale and Local Martingale Integrators Cylindrical Brownian Motion Martingale Theory in Hilbert Spaces Integration with Respect to Cylindrical Brownian Motion Stochastic Differential Equations in Infinite Dimensions The Stratonovich Integral Strong Solutions in the Abstract Framework Uniqueness and Maximality Stratonovich SPDEs in the Abstract Framework Weak Solutions in the Abstract Framework Time-Dependent Operators Toolbox for Nonlinear SPDEs Existence and Uniqueness in Finite Dimensions Tightness Criteria Cauchy Criteria Enhanced Regularity and an Energy Equality SPDEs with Constant Multiplicative Noise Appendix A Classical Results from the Real Valued Theory Classical Tightness Criteria Stochastic Grönwall Lemma References Index

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Goodair D. Stochastic Calculus in Infinite Dimensions and SPDEs 2024.pdf 4.9 MB

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goodair d stochastic calculus infinite dimensions spdes 2024

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