TY - GEN AU - Stavroulakis,Ioannis AU - Jafari,H AU - Stavroulakis,Ioannis AU - Jafari,H TI - New developments in Functional and Fractional Differential Equations and in Lie Symmetry SN - books978-3-0365-1159-7 PY - 2021/// CY - Basel, Switzerland PB - MDPI - Multidisciplinary Digital Publishing Institute KW - Research & information: general KW - bicssc KW - Mathematics & science KW - integro-differential systems KW - Cauchy matrix KW - exponential stability KW - distributed control KW - delay differential equation KW - ordinary differential equation KW - asymptotic equivalence KW - approximation KW - eigenvalue KW - oscillation KW - variable delay KW - deviating argument KW - non-monotone argument KW - slowly varying function KW - Crank-Nicolson scheme KW - Shifted Grünwald-Letnikov approximation KW - space fractional convection-diffusion model KW - variable coefficients KW - stability analysis KW - Lane-Emden-Klein-Gordon-Fock system with central symmetry KW - Noether symmetries KW - conservation laws KW - differential equations KW - non-monotone delays KW - fractional calculus KW - stochastic heat equation KW - additive noise KW - chebyshev polynomials of sixth kind KW - error estimate KW - fractional difference equations KW - delay KW - impulses KW - existence KW - fractional Jaulent-Miodek (JM) system KW - fractional logistic function method KW - symmetry analysis KW - lie point symmetry analysis KW - approximate conservation laws KW - approximate nonlinear self-adjointness KW - perturbed fractional differential equations N1 - Open Access N2 - Delay, difference, functional, fractional, and partial differential equations have many applications in science and engineering. In this Special Issue, 29 experts co-authored 10 papers dealing with these subjects. A summary of the main points of these papers follows:Several oscillation conditions for a first-order linear differential equation with non-monotone delay are established in Oscillation Criteria for First Order Differential Equations with Non-Monotone Delays, whereas a sharp oscillation criterion using the notion of slowly varying functions is established in A Sharp Oscillation Criterion for a Linear Differential Equation with Variable Delay. The approximation of a linear autonomous differential equation with a small delay is considered in Approximation of a Linear Autonomous Differential Equation with Small Delay; the model of infection diseases by Marchuk is studied in Around the Model of Infection Disease: The Cauchy Matrix and Its Properties. Exact solutions to fractional-order Fokker-Planck equations are presented in New Exact Solutions and Conservation Laws to the Fractional-Order Fokker-Planck Equations, and a spectral collocation approach to solving a class of time-fractional stochastic heat equations driven by Brownian motion is constructed in A Collocation Approach for Solving Time-Fractional Stochastic Heat Equation Driven by an Additive Noise. A finite difference approximation method for a space fractional convection-diffusion model with variable coefficients is proposed in Finite Difference Approximation Method for a Space Fractional Convection-Diffusion Equation with Variable Coefficients; existence results for a nonlinear fractional difference equation with delay and impulses are established in On Nonlinear Fractional Difference Equation with Delay and Impulses. A complete Noether symmetry analysis of a generalized coupled Lane-Emden-Klein-Gordon-Fock system with central symmetry is provided in Oscillation Criteria for First Order Differential Equations with Non-Monotone Delays, and new soliton solutions of a fractional Jaulent soliton Miodek system via symmetry analysis are presented in New Soliton Solutions of Fractional Jaulent-Miodek System with Symmetry Analysis UR - https://mdpi.com/books/pdfview/book/4155 UR - https://directory.doabooks.org/handle/20.500.12854/76706 ER -