On the rate of convergence of weak Euler approximation for non-degenerate SDEs

The paper estimates the rate of convergence of the weak Euler approximation for the solutions of SDEs with Hoelder continuous coefficients driven by point and martingale measures. The equation considered has a non-degenerate main part whose jump intensity measure is absolutely continuous with respect to the Levy measure of a spherically-symmetric stable process. It includes the nondegenerate diffusions and SDEs driven by Levy processes.Comment: Added references, corrected typo

Model problem for integro-differential Zakai equation with discontinuous observation processes in H\"older spaces

The existence and uniqueness of solutions of the Cauchy problem to a a stochastic parabolic integro-differential equation is investigated. The equattion considered arises in nonlinear filtering problem with a jump signal process and jump observation

On Lp -theory for parabolic and elliptic integro-differential equations with scalable operators in the whole space

Elliptic and parabolic integro-differential model problems are considered in the whole space. By verifying H\"ormander condition, the existence and uniqueness is proved in L_{p}-spaces of functions whose regularity is defined by a scalable, possibly nonsymmetric, Levy measure. Some rough probability density function estimates of the associated Levy process are used as well

On the Cauchy problem for integro-differential operators in H\"older classes and the uniqueness of the martingale problem

The existence and uniqueness in H\"older spaces of solutions of the Cauchy problem to parabolic integro-differential equation of the order {\alpha}\in(0,2) is investigated. The principal part of the operator has kernel m(t,x,y)/|y|^{d+{\alpha}} with a bounded nondegenerate m, H\"older in x and measurable in y. The result is applied to prove the uniqueness of the corresponding martingale problem

On the Cauchy problem for integro-differential equations in the scale of spaces of generalized smoothness

Parabolic integro-differential model Cauchy problem is considered in the scale of Lp -spaces of functions whose regularity is defined by a scalable Levy measure. Existence and uniqueness of a solution is proved by deriving apriori estimates. Some rough probability density function estimates of the associated Levy process are used as well

On the Cauchy problem for stochastic integro-differential equations with radially O-regularly varying Levy measure

Parabolic integro-differential nondegenerate Cauchy problem is considered in the scale of L_{p} spaces of functions whose regularity is defined by a Levy measure with O-regulary varying radial profile. Existence and uniqueness of a solution is proved by deriving apriori estimates. Some probability density function estimates of the associated Levy process are used as well.Comment: arXiv admin note: text overlap with arXiv:1805.0323

On the Cauchy problem for nondegenerate parabolic integro-differential equations in the scale of generalized H\"older spaces

Parabolic integro-differential non degenerate Cauchy problem is considered in the scale of H\"older spaces of functions whose regularity is defined by a radially O-regularly varying L\'evy measure. Existence and uniqueness and the estimates of the solution are derived

Global L_2-solutions of stochastic Navier-Stokes equations

This paper concerns the Cauchy problem in R^d for the stochastic Navier-Stokes equation \partial_tu=\Delta u-(u,\nabla)u-\nabla p+f(u)+ [(\sigma,\nabla)u-\nabla \tilde p+g(u)]\circ \dot W, u(0)=u_0,\qquad divu=0, driven by white noise \dot W. Under minimal assumptions on regularity of the coefficients and random forces, the existence of a global weak (martingale) solution of the stochastic Navier-Stokes equation is proved. In the two-dimensional case, the existence and pathwise uniqueness of a global strong solution is shown. A Wiener chaos-based criterion for the existence and uniqueness of a strong global solution of the Navier-Stokes equations is established.Comment: Published at http://dx.doi.org/10.1214/009117904000000630 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org

On Some Properties of Space Inverses of Stochastic Flows

We derive moment estimates and a strong limit theorem for space inverses of stochastic flows generated by jump SDEs with adapted coefficients in weighted H\"older norms using the Sobolev embedding theorem and the change of variable formula. As an application of some basic properties of flows of continuous SDEs, we derive the existence and uniqueness of classical solutions of linear parabolic second order SPDEs by partitioning the time interval and passing to the limit. The methods we use allow us to improve on previously known results in the continuous case and to derive new ones in the jump case.Comment: 30 pages; Part of the material of this paper is from the first version of our paper entitled "On Classical Solutions of Linear Stochastic Integro-Differential Equations" (arXiv:1404.0345). We have removed this material from arXiv:1404.034

On Classical Solutions of Linear Stochastic Integro-Differential Equations

We prove the existence of classical solutions to parabolic linear stochastic integro-differential equations with adapted coefficients using Feynman-Kac transformations, conditioning, and the interlacing of space-inverses of stochastic flows associated with the equations. The equations are forward and the derivation of existence does not use the "general theory" of SPDEs. Uniqueness is proved in the class of classical solutions with polynomial growth.Comment: 50 pages; We have removed some of the material on inverse flows and moved it to the paper "On Some Properties of Space Inverses of Stochastic Flows" (arXiv:1411.6277). Also, the assumptions for our main existence theorem (Theorem 2.5 in new version) have been modified and we have formulated our representation theorem (Theorem 2.2 in new version) for an equation with a special for