Asymptotic Properties of Metrically Transitive Matrix and Differential Operators

1992 ◽  
pp. 58-135
Author(s):  
Leonid Pastur ◽  
Alexander Figotin
Keyword(s):  
Differential Operators ◽  
Asymptotic Properties

scholarly journals Generalized Bilinear Differential Operators Application in a (3+1)-Dimensional Generalized Shallow Water Equation

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jingzhu Wu ◽  
Xiuzhi Xing ◽  
Xianguo Geng
Keyword(s):  
Shallow Water ◽  
Differential Operators ◽  
Shallow Water Equation ◽  
Asymptotic Properties ◽  
Soliton Solutions ◽  
Periodic Wave ◽  
Periodic Wave Solution ◽  
Bell Polynomials ◽  
Periodic Wave Solutions ◽  
Wave Solutions

The relations betweenDp-operators and multidimensional binary Bell polynomials are explored and applied to construct the bilinear forms withDp-operators of nonlinear equations directly and quickly. Exact periodic wave solution of a (3+1)-dimensional generalized shallow water equation is obtained with the help of theDp-operators and a general Riemann theta function in terms of the Hirota method, which illustrate that bilinearDp-operators can provide a method for seeking exact periodic solutions of nonlinear integrable equations. Furthermore, the asymptotic properties of the periodic wave solutions indicate that the soliton solutions can be derived from the periodic wave solutions.

On subordinacy and spectral multiplicity for a class of singular differential operators

1998 ◽  
Vol 128 (3) ◽  
pp. 549-584 ◽  
Author(s):  
D. J. Gilbert
Keyword(s):  
Differential Operators ◽  
Asymptotic Properties ◽  
Sufficient Conditions ◽  
Positive Lebesgue Measure ◽  
Spectral Multiplicity ◽  
Limit Circle Case ◽  
Separated Boundary Conditions ◽  
Image Position ◽  
Necessary And Sufficient ◽  
Adjoint Operators

The spectral multiplicity of self-adjoint operators H associated with singular differential expressions of the formis investigated. Based on earlier work of I. S. Kac and recent results on subordinacy, complete sets of necessary and sufficient conditions for the spectral multiplicity to be one or two are established in terms of: (i) the boundary behaviour of Titchmarsh–Weyl m-functions, and (ii) the asymptotic properties of solutions of Lu = λu, λ∈ℝ, at the endpoints a and b. In particular, it is shown that H has multiplicity two if and only if L is in the limit point case at both a and b and the set of all λ for which no solution of Lu = λu is subordinate at either a or b has positive Lebesgue measure. The results are completely general, subject only to minimal restrictions on the coefficients p(r), q(r)and w(r), and the assumption of separated boundary conditions when L is in the limit circle case at both endpoints.

Estimates for the state density for ordinary differential operators with white gaussian noise potential

1983 ◽  
Vol 95 (3-4) ◽  
pp. 263-274
Author(s):  
V. B. Moscatelli ◽  
M. Thompson
Keyword(s):  
Wiener Process ◽  
Lower Bounds ◽  
Gaussian Noise ◽  
Differential Operators ◽  
Asymptotic Properties ◽  
State Density ◽  
The State ◽  
Upper And Lower Bounds ◽  
Ordinary Differential Operators ◽  
Image Position

SynopsisThe present paper is concerned with developing the existence and asymptotic properties of the state density N(λ) associated with certain higher order random ordinary differential operators A of the formwhere Ao has homogeneous and ergodic coefficients with respect to the σ-algebra generated by the Wiener process q(ω, x). The analysis uses the Weyl min-max principle to determine rough upper and lower bounds for N(λ).

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