This book constitutes refereed proceedings of the 4th Maple Conference, MC 2020, held in Waterloo, Ontario, Canada, in November 2020. The 25 revised full papers and 3 short papers were carefully reviewed and selected out of 75 submissions, one invited paper is also presented in the volume.

Bohemian Matrices: Past, Present and Future.- The TruncatedSeries Package for Solving Linear Ordinary Differential Equations Having Truncated Series Coefficients.- Computation of the Observed Spectral Sequence Spectrum for Nucleotide Sequence Alignments.- Multivariate Power Series in Maple.- Bernoulli's problem x^y=y^x and Maple.- Student satisfaction determinants in hybrid learning environments based on MAPLE.- Puiseux Series and Algebraic Solutions of First Order Autonomous AODEs -- A MAPLE Package.- Algebraic Aspects of a Rank Factorization Problem Arising in Vibration Analysis.- Computation of the L∞-norm of finite-dimensional linear systems.- A Maple package to deal with the birationality of curves and surfaces parametrizations.- A Maple implementation of the finite element method for solving boundary-value problems for systems of second-order ordinary differential equations.- Blends in Maple.- Certified evaluations of Hölder continuous functions at roots of polynomials.-Maple for Distance Education in Secondary Schools during the Covid-19 Emergency.- Development of Problem Solving Skills with Maple in Higher Education.- Modelling and sensitivity analysis of nonlinear firefighting systems using Maple.- Merging Maple and GeoGebra Automated Reasoning Tools.- AGADE---A Maple Package for Computing Rational General Solutions of Parametrizable First-Order Algebraic ODEs.- Estimation of Travel Time for Additional Metrobus Route.- Understanding math concepts in music and vice-versa.- Numerical solution for radial distortion rectification in optical systems.- A simplified introduction to virus propagation using Maple's Turtle Graphics package suitable for children.- A Maple Toolchain for Rigid Body Dynamics of Serial, Hybrid and Parallel Robots.- Rational Trigonometry Using Maple.- Power Series Representations of Hypergeometric Type Functions.- Rational cone of norm-invariant vectors under a matrix action.- Branching out into Structural Identifiability Analysiswith Maple: Interactive Exploration of Uncontrolled Linear Time-Invariant Structures.- A Maple exploration of Problem 6 of the IMO 88.- An Isometric Embedding of the Impossible Triangle into the Euclidean Space of Lowest Dimension.- "A Poly-algorithmic Quantifier Elimination Package in Maple" Erratum.

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