### SLA_DMXM

Multiply $3×3$ Matrices

ACTION:
Product of two $3×3$ matrices (double precision).
CALL:
CALL sla_DMXM (A, B, C)
##### GIVEN:
 A D(3,3) matrix A B D(3,3) matrix B

##### RETURNED:
 C D(3,3) matrix result: A$×$B

NOTE:
To comply with the ANSI Fortran 77 standard, A, B and C must be different arrays. However, the routine is coded so as to work properly on many platforms even if this rule is violated, something that is not, however, recommended.