Partial differential equations

Description
Partial differential equations are comprises of functions of several variables. This is explained with the example of the heat equation where temperature depends on three other variables namely x, y, z. The terms gradient and tangent plane are introduced and analysed.
Prof. Denis Auroux, Maths, Fall 2007,18.02 Multivariable Calculus: 15:Partial Differential Equations, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed September 19,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc