Analysis, Applications, and Computations Proceedings of the 13th ISAAC Congress, Ghent, Belgium, 2021

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Part I Plenary Lecture.-
A Review of Univariate and Multivariate Multifractal Analysis Illustrated by the Analysis of Marathon Runners Physiological Data.-
Part II Applications of Dynamical Systems Theory in Biology.-
Wavefronts in Forward-Backward Parabolic Equations and Applications to Biased Movements.- Bohr-Levitan Almost Periodic and Almost Automorphic Solutions of Equation 
x' (t) = f(t – 1, x(t – 1)) – f(t, x(t))
.- Periodic Solutions in a Differential Delay Equation Modeling Megakaryopoiesis.- Discrete and Continuous Models of the COVID-19 Pandemic Propagation with a Limited Time Spent in Compartments.-
Part III Challenges in STEM Education.-
Some Aspects of Usage of Digital Technologies in Mathematics Education.- Teaching of STEM Lectures During the COVID-19 Time.- Extra-Curricular Activities to Promote STEM Learning.- Usage of Online Platforms in Education of Mathematics in Transcarpathia atthe Beginning of Quarantine.- The Use of Technologies to Promote Critical Thinking in Pre-service Teachers.- Alarming Changes in Polish Education vs Longlife and Remote Learning.- The Most Common Mathematical Mistakes in the Teaching of Scientific Subjects at Secondary Schools.- Challenges to the Development of Effective Creativity.-
Part IV Complex Analysis and Partial Differential Equations.-
Universality of the Dirichlet Series in the Complex Plane.- On One Oscillation Problem of Zeroth Approximation of Hierarchical Model for Porous Elastic Plates with Variable Thickness.- Solution of the Kirsch Problem for the Elastic Materials with Voids in the Case of Approximation 
N = 1 
of Vekua’s Theory.- Analysis of BVP for Some Elliptic Systems on a Complex Plane.- Second Order Differential Operators Associated to the Space of Holomorphic Functions.- Constructional Method for a Non-local Boundary and Initial Problem Raised from a Free Boundary Model of Cancer.-
Part V Complex Variables and Potential Theory.-
A Perturbation Result for a Neumann Problem in a Periodic Domain.- On One Inequality for Non-overlapping Domains.- Schwarz Lemma Type Estimates for Solutions to Nonlinear Beltrami Equation.- On Conditions of Local Lineal Convexity Generalized to Commutative Algebras.- On a Quadrature Formula for the Direct Value of the Double Layer Potential.- Menchov–Trokhimchuk Theorem Generalized for Monogenic Functions in a Three-Dimensional Algebra.-
Part VI Constructive Methods in the Theory of Composite and Porous Media.-
Monodromy of Pfaffian Equations for Group-Valued Functions on Riemann Surfaces.- Introduction to Neoclassical Theory of Composites.- Analogues the Kolosov-Muskhelishvili Formulas for Isotropic Materials with Double Voids.- Schwarz-Christoffel Mapping and Generalised Modulus of a Quadrilateral.- Dimension Reduction in the Periodicity Cell Problem forPlate Reinforced by a Unidirectional System of Fibers.- Self-Consistent Approximations in the Theory of Composites and Their Limitations.- On Electromagnetic Wave Equations for a Nonhomegenous Microperiodic Medium.-
Part VII Generalized Functions and Applications.-
A Note on Composition Operators Between Weighted Spaces of Smooth Functions.- 1D Hyperbolic Systems with Nonlinear Boundary Conditions II: Criteria for Finite Time Stability.- 1D Hyperbolic Systems with Nonlinear Boundary Conditions I: .
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-Generalized Solutions.- On Classification of Semigroups Associated to Levy Processes.-
Part VIII Harmonic Analysis and Partial Differential Equations.-
The Index of Toeplitz Operators on Compact Lie Groups and on Simply Connected Closed 3-Manifolds.-
Part IX Partial Differential Equations on Curved Spacetimes
.- Lorentzian Spectral Zeta Functions on Asymptotically Minkowski Spacetimes.- Aspects of Non-associative Gauge Theory.- Remarks on Global Smoothing Effect of Solutions to Nonlinear ElasticWave Equations with Viscoelastic Term.- Local and Global Solutions for the Semilinear Proca Equations in the de Sitter Spacetime.- Numerical Simulations of Semilinear Klein–Gordon Equation in the de Sitter Spacetime with Structure-Preserving Scheme.-
Part X Recent Progress in Evolution Equations.-
Global Small Data Solutions for an Evolution Equation with Structural Damping and Hartree-Type Nonlinearity.- A Note on Continuity of Strongly Singular Calderón-Zygmund Operators in Hardy-Morrey Spaces.- The Asymptotic Estimates of the Solutions to the Linear Damping Models with Spatial Dependent Coefficients.- A Klein-Gordon Model with Time-Dependent Coefficients and a Memory-Type Nonlinearity.- Intrinsic Polynomial Squeezing for Balakrishnan-Taylor Beam Models.- On the Wave-Like Energy Estimates of Klein-Gordon Type Equations with Time Dependent Potential.- Non-Linear Evolution Equations with Non-Local Coefficients and Zero-Neumann Condition: One Dimensional Case.- Nonlinear Perturbed BLMP Equation.-
Part XI Wavelet Theory and Its Related Topics.-
Holomorphic Curves with Deficiencies and the Uniqueness Problem.- On Some Topics Related to the Gabor Wavelet Transform.- On the Diameters and Radii of the Extended Sierpiński Graphs.- Some Inequalities for Parseval Frames.-
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-Adic Time-Frequency Analysis and Its Properties.