%0 Book Section %T An extension of Whitney approximation theorem publisher UCM %D 2012 %U 978-84-695-4421-1 %@ https://hdl.handle.net/20.500.14352/45357 %X The classical Whitney approximation theorem states that a smooth function function f: Rn - R can be approximated by analytic functions. We prove that these analytic functions approximating f can be taken aas real holomorphic functions on the whole space Cn. %~