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4.12 MUA2PC

Aim:

Linearly combine two symmetric matrices  A1 and A2 stored in data structures MUA1 and MUA2. The result is a MUA data structure, which contains the matrix .

Utilization:

• dimension array M (in the blank common),
• call INITI,
• create the input data structures MUA1 and MUA2.

Call the module:

                          
       CALL MUA2PC(M,ALPHA1,NFMUA1,NIMUA1,
     +               ALPHA2,NFMUA2,NIMUA2,
     +                     NFMUAS,NIMUAS)

where:

• M: the super array,
• ALPHA1 (double precision): the multiplication coefficient of matrix A1,
• NFMUA1: the number of the support file of I.D.S. MUA: MUA1 (NFMUA1 ),
• NIMUA1: its level number,
• ALPHA2 (double precision): the multiplication coefficient of matrix A2,
• NFMUA2: the number of the support file of I.D.S. AMUA: MUA2 (NFMUA2 ),
• NIMUA2: its level number,
• NFMUAS: the number of the support file of O.D.S. MUA: MUAS (NFMUAS ),
• NIMUAS: its level number.

  Note:

  if NIMUA1=NIMUAS (resp. if NIMUA2=NIMUAS) the skyline of A2 must be contained inside the skyline of A1 (resp. the skyline of A1 must be contained inside that of A2).

  In addition, if NIMUA1=NIMUA2, then NFMUA1 and NFMUA2 must be equal.