Part I - Memorial Contributions -- Life and career -- Water-colours by Boris Pavlov -- Family and leisure -- Pavlov's mathematics -- Part II - Research Papers -- Singular perturbations of unbounded selfadjoint operators. Reverse approach -- Generic asymptotics of resonance counting function for Schrödinger point interactions -- Spectral clusters, asymmetric spaces, and boundary control for Schrodinger equation with strong singularities -- The second Weyl coefficient for a first order system -- A Lieb-Thirring type inequality for magnetic Schrödinger operators with a radial symmetry -- Scattering matrices and Weyl functions of quasi boundary triples -- On the spectrum of the quantum Rabi model -- Scattering theory for a class of non-selfadjoint extensions of symmetric operators -- Asymptotics of Chebyshev polynomials, III. Sets saturating Szego, Schiefermayr, and Totitk-Widom bounds -- Solvability and complex limit characteristics -- Quantization of Gaussians -- A resonance interaction of seismogravitational modes of tectonic plates -- On positivity preserving, translation invariant, operators in Lp(Rn)m -- The distribution of path lengths on directed weighted graphs -- Diagonalization of indenite saddle point forms -- Solutions of Gross-Pitaevskii equation with periodic potential in dimension two -- The Integral Transform of N.I. Akhiezer -- On Gaussian random matrices coupled to the discrete Laplacian -- Modern results in the spectral analysis for a class of integral-difference operators and application to physical processes -- Inverse problem for integral-difference operators on graphs -- Quantum graph in a magnetic field and resonance states completeness -- On Zd-symmetry of spectra of some nuclear operators -- Spectral monotonicity for Schrödinger operators on metric graphs -- Linear Operators and Operator Functions Associated with Spectral Boundary Value Problem.