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Question about strong regularity of (parametric) interval matrices

Dear Members of Interval Community,

I have the following question. Most of papers on solving interval linear
systems says that interval matrix is strongly regular if
or equivalently if
[B]=mid(A))^{-1}[A] is regular.
But we can also post-multiply the matrix, and it is probable that the matrix
[B] will not be regular, but the matrix
[C]=[A}A^{-1} will be regular.
So, shouldn't the definition of strong regularity of interval matrices be changed? I am in fact more interested in parametric interval matrices, but parametric
matrices are strictly connected with interval matrices.

Best regards,
  Iwona Skalna

 ___ ____ __ __
| _ |   _|  |  | | Iwona Skalna                            |
|   |  | |     | | Department of Applied Computer Science  |
|_|_|____|__|__| | ul. Gramatyka 10, 30-067 Kraków, Polska |