books.google.fr - Most physical phenomena, whether in the domain of fluid dynamics, electricity, magnetism, mechanics, optics, or heat flow, can be described in general by partial differential equations. Indeed, such equations are crucial to mathematical physics. Although simplifications can be made that reduce these...https://books.google.fr/books/about/Partial_Differential_Equations_for_Scien.html?hl=fr&id=VsK_31_j0XgC&utm_source=gb-gplus-sharePartial Differential Equations for Scientists and Engineers
