**"Joseph Fourier 250th Birthday: Modern Fourier Analysis and Fourier Heat Equation in Information Sciences for the XXIst Century"**

*MDPI Entropy* Special Issue.

Guest Editors : Prof. Dr. Frédéric Barbaresco and Prof. Jean-Pierre Gazeau

Deadline for submission: August 31, 2018.

For the 250th birthday of Joseph Fourier, born in 1768 in Auxerre, France, this MDPI Special Issue will explore modern topics related to Fourier
Analysis and Heat Equation. Modern developments of Fourier analysis during the 20th century have explored generalizations of Fourier and Fourier-Plancherel
formula for non-commutative harmonic analysis, applied to locally-compact, non-Abelian groups. In parallel, the theory of coherent states and wavelets has
been generalized over Lie groups. One should add the developments, over the last 30 years, of the applications of harmonic analysis to the description of the
fascinating world of aperiodic structures in condensed matter physics. The notions of model sets, introduced by Y. Meyer, and of almost periodic functions,
have revealed themselves to be extremely fruitful in this domain of natural sciences. The name of Joseph Fourier is also inseparable from the study of the
mathematics of heat. Modern research on heat equations explores the extension of the classical diffusion equation on Riemannian, sub-Riemannian manifolds,
and Lie groups. In parallel, in Geometric Mechanics, Jean-Marie Souriau interpreted the temperature vector of Planck as a space-time vector, obtaining,
in this way, a phenomenological model of continuous media, which presents some interesting properties. A last comment concerns the fundamental contributions
of Fourier analysis to quantum physics: Quantum mechanics and quantum field theory. The content of this Special Issue will highlight papers exploring
non-commutative Fourier harmonic analysis, spectral properties of aperiodic order, the hypoelliptic heat equation, and the relativistic heat equation
in the context of Information Theory and Geometric Science of Information.