The 4th International Conference on Mathematical Modelling, Applied Analysis and Computation-2021 (A Virtual Conference) is a specialized conference on mathematical modelling and its applications. *The conference is dedicated to Prof. George A. Anastassiou, Department of Mathematical Sciences, University of Memphis, USA who will turn sixty nine in November 2021.* The scope of **ICMMAAC-2021** conference covers theoretic and applied aspects of the various types of mathematical modelling (Differential equations, Fractional differential equations, Distribution functions, Fuzzy mathematical models, etc.) for systems of dynamic nature (Deterministic, Stochastic, Continuous, Discrete or Hybrid with respect to time, etc.), applied analysis and usage of analytical and numerical techniques in handling modern problems of science, engineering and finance. It aims, in particular, at fostering cooperation among practitioners and theoreticians in this field.

Fractional calculus | Advanced Analysis |

Special Functions | Differential Equations |

Fluid dynamics | Applied Statistics |

Approximation Theory | Automation |

Chaos Theory | Relativity and Cosmology |

Circuits and Networks | Complexity Theory |

Computational Mechanics | Computational Engineering |

Continuous Modelling | Control Theory |

Cyber Security | Discrete Mathematics |

Dynamical Systems | Evolutionary Computation |

Fuzzy Sets and Logic | Information Theory and Coding |

Inverse Problems | Mathematical Biology |

Mathematical Physics | Mathematical Sociology |

Neural Networks | Numerical Analysis |

Optimal Control | Scientific Computing |

System Dynamics | Applied Mathematics and Modeling |

Artificial Intelligence | Big Data Analytics |

Control and Robotics | Number theory & Cryptography |

Discrete Geometry | Elastodynamics |

Financial Mathematics | Image/Signal Processing |

Mathematical Chemistry | Mathematical Engineering |

Mathematical Psychology | Operations Research |

Representation Theory | Soft computing |