This book features a collection of papers by plenary, semi-plenary and invited contributors at IWOTA2021, held at Chapman University in hybrid format in August 2021. The topics span areas of current research in operator theory, mathematical physics, and complex analysis.

- Infinite Order Differential Operators with a Glimpse to Applications to Superoscillations. - Interpolation in Multivariable de Branges-Rovnyak Spaces. - Monotonicity of Certain Left and Right Riemann Sums. - A Survey on the Recent Advances in the Spectral Theory on the S-Spectrum. - Stochastics and Dynamics of Fractals. - Fluid–Plate Interaction with Kelvin-Voigt Damping and Bending Moment at the Interface: Well-posedness, Spectral Analysis, Uniform Stability. - Automorphisms of Hyper-Reinhardt Free Spectrahedra. - Arithmetic and Analysis of the Series ∞Σn=1 1/n sin x/n, Part II. - Lipschitz-Type Bounds for Functions of Operators with Noncompact Perturbations. - Extended Fock Space Formalism and Polyanalytic Functions. - Estimates of Cauchy–Szegö Kernel in Hardy Spaces on Nilpotent Lie Groups of Step Two.

This book features a collection of papers by plenary, semi-plenary and invited contributors at IWOTA2021, held at Chapman University in hybrid format in August 2021. The topics span areas of current research in operator theory, mathematical physics, and complex analysis.

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