(1) E.T.S.I. Navales, Universidad Politécnica de Madrid, Arco de la Victoria s/n, 28040 Madrid, Spain
Abstract:
A conjecture stated by Raychaudhuri which claims that the only physical perfect fluid non-rotating non-singular cosmological models are comprised in the Ruiz–Senovilla and Fernández–Jambrina families is shown to be incorrect. An explicit counterexample is provided and the failure of the argument leading to the result is explicitly pointed out.
