<p>Preface.- I. Theory of Functional Analysis, Operator Theory, and Applications.- Elena Afanaseva, Anatoly Golberg: Mappings of finite area distortion: Hausdorff measures.- Alexander Cardona, Santiago Gomez Cobos: The principal symbol of elliptic differential operators on Lie groups and homogeneous spaces.- Arran Fernandez, Cihan Gueder, Walaa Yasin: On fractional quaternionic d-bar derivatives.- Brian Grajales, Julieth Saavedra: A note on homogeneous geometry of G2-type real flag manifolds.- Junqing Huang: Semi-sparsity for Piecewise Constant Functions on Triangular Mesh Denoising.- Mikhail Isaev, Roman G. Novikov, Grigory V. Sabinin: Superresolution reconstruction from truncated Fourier transform.- Aitolkyn H. Kalidolday, Erlan D. Nursultanov: Interpolation theorem for discrete net spaces.- Vishvesh Kumar, Joel E. Restrepo: Titchmarsh theorem by modulus of continuity for the deformed Hankel–Lipschitz classes.- Juan Pablo Velasquez-Rodriguez: Titchmarsh Theorems for Hoelder- Lipschitz functions on profinite groups.- Xuechao Wang, Sven Nomm, Junqing Huang, Marianna Chatzakou, Michael Ruzhansky: An efficient neural network for the diagnosis of Parkinson’s disease using dynamic handwriting analysis.- II. Classical and non-classical problems of PDEs.- Irfan Ali: On q2-analogue of the one-dimensional non-homogeneous heat equation.- Ravshan Ashurov, Oqila Mukhiddinova: Non-local and inverse problems for the Rayleigh-Stokes equation.- Marianna Chatzakou, Abhilash Tushir: Very weak solution of the discrete Heat Equation with irregular time-dependent thermal conductivity.- Mulugeta A. Dagnaw: On a Mixed Stokes Problem with Variable Viscosity in the 2D Exterior Domain.- Nurbek Kakharman: The mixed initial-boundary value problem for degenerate hyperbolic equation.- Tynysbek Sh. Kalmenov: A criterion for minimality of the mixed type operators.- Baltabek Kanguzhin, Zhalgas Kaiyrbek: An analogue of the d’Alembert formula for the Gurtin-Pipkin equation with multipoint boundary conditions for zero initial data.- Bakytbek Koshanov, Maksat Bakytbek: On Fredholm solvability and on the index of the generalized Neumann problem for an elliptic equation of highorder on a plane.- Nedyu Popivanov, Todor Popov, Ingo Witt: Solutions with power type orexponential singularity for (3+1)-D Protter-Morawetz problems.- Makhmud Sadybekov, Batirkhan Turmetov: Boundary Value Problems for Differential Equations with a High-Order Derivative in the boundary condition.- Serikbol Shaimardan: A Cauchy problem for q-heat equation.- Marian Slodicka: Evolutionary PDEs with Volterra operators: direct and inverse source problems.- Karel Van Bockstal: Inverse source problems in thermoelasticity.- Rong Zhang: A Direct Method of Moving Planes for Logarithmic Schroedinger Operator.</p><br><p></p>