!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms 
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#if defined (DOC)
*
***comdeck prec.cdk
*
*revision
* v3_23 - Qaddouri A.          - initial version
*
*______________________________________________________________________
*                                                                      |
*PROJECTION OPERATORS and VARIABLES ASSOCIATED WITH THE PRECONDITIONING|
*______________________________________________________________________|
*                    |                                                 |
* NAME               | DESCRIPTION                                     |
*--------------------|-------------------------------------------------|
* Prec_xevec_8       | Local horizontal eigenvectors                   |
* Prec_xeval_8       | Local horizontal eigenvalues                    |
*--------------------|-------------------------------------------------|
* Prec_ai_8          |  sub-   diagonal of LU factorization            |
* Prec_bi_8          |         diagonal of LU factorization            |
* Prec_ci_8          |  super- diagonal of LU factorization            |
*----------------------------------------------------------------------
* Prec_ncol          |                                                 |
* Prec_mycol         |                                                 |
*----------------------------------------------------------------------|
*
*
#endif
*
      integer Prec_ncol,Prec_mycol
      common / prec_i / Prec_ncol,Prec_mycol
*
      real*8, dimension(:), pointer :: Prec_xevec_8,Prec_xeval_8,
     $                                 Prec_ai_8,Prec_bi_8,Prec_ci_8
      common / prec_p / Prec_xevec_8,Prec_xeval_8,
     $                  Prec_ai_8,Prec_bi_8,Prec_ci_8