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The GUPTRI Form of a Regularized Problem.
The deflations made in the staircase
algorithm result in an exact GUPTRI form of a nearby matrix
If all range/null space separations
in the GUPTRI algorithm are well defined with respect
to the deflation tolerance parameters and gap, then
The nearby problem represents a regularized problem that
has a stable Kronecker structure with respect to the
deflation criteria of the algorithm.