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4.1 AMATB

Aim:

Performs the product: where A is a matrix stored in an AMAT structure and b is a vector  (or eventually several vectors) stored in a B structure. The result is stored in a B data structure.

Utilization:

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

Call the module:

                          
      CALL AMATB(M,NFAMAT,NIAMAT,NFBE,NIBE,NFBS,NIBS)

where:

• M: the super array,
• NFAMAT: the number of the support file of I.D.S. AMAT,
• NIAMAT: its level number,
• NFBE: the number of the support file of I.D.S. B,
• NIBE: its level number,
• NFBS: the number of the support file of O.D.S. B,
• NIBS: its level number.