期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 207 (3)
Dynamic systems acting on the plane and possessing the Wada property have been observed. There exist only two topological types, symmetric and antisym......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 206 (3)
Using the so-called Schubert decomposition, we present a finite-dimensional twisted description of the tau functions of the universal character (UC ) ......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 208 (1)
We discuss the stationary potential equations as illustrative examples to explain how to construct integrable symplectic maps via Backlund transformat......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 206 (2)
For the Novikov equation, we construct and study a Backlund transformation containing both independent and dependent variables. We use the reciprocal ......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 207 (1)
We use the Riemann-Hilbert (RH) method to study the Kundu-type nonlinear Schrodinger (Kundu-NLS) equation with a zero boundary condition in the case w......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 206 (1)
We systematically present an inverse scattering transform for a nonlocal reverse-space higher-order nonlinear Schrodinger equation with nonzero bounda......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 206 (2)
We use the method of Lie symmetry analysis to investigate the properties of a (2+1)-dimensional KdV-mKdV equation. Using the Ibragimov method, which r......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 208 (1)
Although variance, as one of the most fundamental and ubiquitous quantities in quantifying uncertainty, has been widely used in both classical and qua......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 207 (3)
We use the group-based discrete moving frame method to study invariant evolutions in a n-dimensional centro-affine space. We derive the induced integr......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 206 (2)
By including spectral functions, we obtain nonlocal symmetries equivalent to Lie point symmetries of the corresponding extended systems for the Boussi......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 207 (1)
Using the Hamiltonian structures and tau symmetries, we construct a multicomponent fractional Volterra hierarchy (MFVH) as an example of a generalized......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2021; 208 (1)
We consider two different subjects: the q-deformed universal characters (S) over tilde ([lambda,mu])(t, (t) over cap; x, (x) over cap) and the q-defor......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2020; 202 (1)
Both conservative and nonconservative systems can be studied simultaneously using the differential variational principle of Herglotz type. For a pertu......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2020; 202 (1)
Skew information was introduced by Wigner and Yanase in the context of quantum measurements. It was later recognized that skew information in addition......
期刊： THEORETICAL AND MATHEMATICAL PHYSICS, 2020; 202 (2)
We develop Darboux transformations (DTs) and their associated Crum's formulas for two Schrodinger-type difference equations that are themselves discre......
