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On a digital approximation for pseudo-differential operatorsWe introduce a concept of a discrete pseudo-differential operator using general ideas of the theory

Periodic Trajectories and Coincidence Points of Tuples of Set-Valued Maps such that the product of their Lipschitz constants is less than 1. The notion of a Lipschitz tuple of (finitely many

Differences of idempotents in C*-algebras to the domain of definition of φ then φ(P − Q) is a real number. The commutativity of some operators

Correctness of a Two-dimensional Cauchy Problem for a Polynomial Difference Operator with Constant CoefficientsThe correctness of Cauchy problem for a polynomial difference operator is studied. An easily

Ando's inequality for uniform submajorization if the operator monotone function has a very simple rational form.

Two-dimensional reductions of the cone of positive diagonal operators in ℓ2. The set of all bounded linear operators acting on the Hilbert space is also considered. It is shown

Probability operator of a harmonic oscillatorA unique linear rule of constructing quantum operators defined by the probability operator

On the structure of the solution of singularly perturbed initial boundary value problems with an unbounded spectrum of the limit operator of ordinary differential equations on the semiaxis with an unbounded spectrum of the limit operator. We give a

Pseudo-differential operators on manifolds with a singular boundary pseudo-differential operators acting in functional spaces on such manifolds. Fredholm properties

Lebesgue constant estimation in multidimensional Sobolev spaceThe norm estimation of the Lagrange interpolation operator is obtained. It is shown that the rate

Страница 9 из 30993