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Uniqueness for stochastic evolution equations in Banach spaces

Martin Ondreját — 2004

Different types of uniqueness (e.g. pathwise uniqueness, uniqueness in law, joint uniqueness in law) and existence (e.g. strong solution, martingale solution) for stochastic evolution equations driven by a Wiener process are studied and compared. We show a sufficient condition for a joint distribution of a process and a Wiener process to be a solution of a given SPDE. Equivalences between different concepts of solution are shown. An alternative approach to the construction of the stochastic integral...

Homotopy algebras via resolutions of operads

Markl, Martin — 2000

Proceedings of the 19th Winter School "Geometry and Physics"

Summary: All algebraic objects in this note will be considered over a fixed field k of characteristic zero. If not stated otherwise, all operads live in the category of differential graded vector spaces over k . For standard terminology concerning operads, algebras over operads, etc., see either the original paper by [“The geometry of iterated loop spaces”, Lect. Notes Math. 271 (1972; Zbl 0244.55009)], or an overview [, “La renaissance des opérads”, Sémin. Bourbaki 1994/95, Exp. No. 792, Asterisque...

Free loop spaces and cyclohedra

Markl, Martin — 2003

Proceedings of the 22nd Winter School "Geometry and Physics"

It is well-known that a based space is of the weak homotopy type of a loop space iff it is a grouplike algebra over an A -operad. The classical model for such an operad consists of Stasheff’s associahedra. The present paper describes a similar recognition principle for free loop spaces. Let 𝒫 be an operad, M a 𝒫 -module and U a 𝒫 -algebra. An M -trace over U consists of a space V and a module homomorphism T : M End U , V over the operad homomorphism 𝒫 End U given by the algebra structure on U . Let 𝒞 1 be the little 1-cubes...

Cells of harmonicity

Kolář, Martin — 1991

Proceedings of the Winter School "Geometry and Physics"

[For the entire collection see Zbl 0742.00067.]We are interested in partial differential equations on domains in 𝒞 n . One of the most natural questions is that of analytic continuation of solutions and domains of holomorphy. Our aim is to describe the domains of holomorphy for solutions of the complex Laplace and Dirac equations. We call them cells of harmonicity. We deduce their properties mostly by examining geometrical properties of the characteristic surface (which is the same for both equations),...

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