Compute the condition number.
PetscErrorCode DSCond(DS ds,PetscReal *cond)
|ds || - the direct solver context
|cond || - the computed condition number
In standard eigenvalue problems, returns the inf-norm condition number of the first
matrix, computed as cond(A) = norm(A)*norm(inv(A)).
In GSVD problems, returns the maximum of cond(A) and cond(B), where cond(.) is
computed as the ratio of the largest and smallest singular values.
Does not take into account the extra row.
Index of all DS routines
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