For a single membrane of stiffness kappa fluctuating between two planar walls
of distance d, we calculate analytically the proportionality constant in the
pressure law p proportional to T^2/kappa^2 d^3, in very good agreement with
results from Monte Carlo simulations.Comment: Author Information under
http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of
paper also at
http://www.physik.fu-berlin.de/~kleinert/kleiner_re277/preprint.htm