Wave Equation. The beauty of the wave equation manifests itself in several ways," says Ian Stewart of the University of Warwick in the UK. "It is mathematically simple and elegant. It has an interesting range of solutions with pleasant mathematical features." The wave equation describes how waves propagate. It applies to all kinds of waves, from water waves to sound and vibrations, and even light and radio waves.
Leonhard Euler (15 April 1707 – 18 September 1783) was a pioneering Swiss mathematician and physicist. He made important discoveries in fields as diverse as infinitesimal calculus and graph theory. He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysis, such as the notion of a mathematical function. He is also renowned for his work in mechanics, fluid dynamics, optics, and astronomy.