*** empty log message ***

docs/pdf/precs.tex

@@ -77,11 +77,13 @@ $ptype$ string as follows\footnote{The string is case-insensitive}:
 \end{description}
 Note that the default corresponds to a Restricted Additive Schwarz
 preconditioner with $ILU(0)$ and 1 level of overlap.
+\item[2L] Second level of a multilevel preconditioner, see below
 \end{description}
 If a multilevel preconditioner is desired, the user should call
-\verb|psb_precset| once choosing AS, and a second time specifying
-$ptype=ML$ with the following optional parameters in $iv$ (see
-also~\cite{APNUM,DD2}): 
+\verb|psb_precset| twice, the first time  choosing an AS variant, and
+a second time specifying 
+$ptype=2L$ with the following optional parameters in $iv$ (see
+also~\cite{APNUM06,DD2}): 
 \begin{description}
 \item[$iv(1)$] Type of multilevel correction, legal values: \verb|no_ml_|,
   \verb|add_ml_prec_|, \verb|mult_ml_prec_|,

src/prec/psb_dprecset.f90

@@ -120,7 +120,7 @@ subroutine psb_dprecset(p,ptype,iv,rs,rv,info)
     end if
 
 
-  case ('ML', '2LEV')
+  case ('ML', '2L', '2LEV')
 
     select case (size(p%baseprecv)) 
     case(1)

src/prec/psb_zprecset.f90

@@ -120,7 +120,7 @@ subroutine psb_zprecset(p,ptype,iv,rs,rv,info)
     end if
 
 
-  case ('ML', '2LEV')
+  case ('ML', '2L','2LEV')
 
     select case (size(p%baseprecv)) 
     case(1)

test/Fileread/df_sample.f90

@@ -254,7 +254,7 @@ program df_sample
          & iv=(/mult_ml_prec_,loc_aggr_,smth_omg_,mat_distr_,post_smooth_,f_ilu_n_,4/))
   case(8)
     call psb_precset(pre,'asm',iv=(/ml,halo_,none_/))
-    call psb_precset(pre,'ml',&
+    call psb_precset(pre,'2l',&
          & iv=(/mult_ml_prec_,loc_aggr_,smth_omg_,mat_distr_,post_smooth_,f_umf_,4/))
 
   case default