M. Cwikel et M. Mastylo, INTERPOLATION SPACES BETWEEN THE LIPSCHITZ CLASS AND THE SPACE OF CONTINUOUS-FUNCTIONS, Proceedings of the American Mathematical Society, 124(4), 1996, pp. 1103-1109
It is shown that the complex interpolation spaces [C([0, 1]), Lip(1)([
0, 1])](theta) and [C([0, 1]), Lip(1)([0, 1])](theta) do not coincide
with Lip(theta)([0, 1]) or lip(theta)([0, 1]) and also that the couple
(C, Lip(1)) is not a Calderon couple. Similar results are also obtain
ed for the couples (C, Lip(alpha)) and (Lip(alpha),Lip(1)) when alpha
is an element of (0, 1).