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Arguments

p type(mld_xprec_type), intent(inout).
  The preconditioner data structure. Note that x must be chosen according to the real/complex, single/double precision version of MLD2P4 under use.
ptype character(len=*), intent(in).
  The type of preconditioner. Its values are specified in Table [*].
  Note that the strings are case insensitive.
info integer, intent(out).
  Error code. If no error, 0 is returned. See Section [*] for details.
nlev integer, optional, intent(in).
  The number of levels of the multilevel preconditioner. If nlev is not present and ptype='ML', 'ml', then nlev=2 is assumed. Otherwise, nlev is ignored.



Salvatore Filippone 2008-07-22