Automatic solution of differential equations using chebfun and chebop The chebfun system is a free MATLAB toolbox that uses automatic Chebyshev polynomial interpolation of functions to enable symbolic-feeling manipulations at numerical speed. The add-on chebop extension applies similar techniques to allow automatic approximation of differential and integral operators. Chebops piggyback on chebfun's automatic adaptation and use lazy evaluation and object overloading in order to express and solve differential equations within standard MATLAB syntax. In this talk I will explain and demonstrate different ways in which chebfuns and chebops can be used to solve ordinary and partial differential equations.