Right, left characteristic sequences and column, row minimal indices of a singular pencil

Abstract
For a general singular pencil sFG∊ℝ m×n [s] the right, left characteristic sequences r(F, G), l(F, G) are defined and they are shown to be of the piecewise arithmetic progression type. The sets of column, row minimal indices ℐc(F, G), ℐr(F, G) are defined by a singular points analysis of r(F, G), ℐl(F, G) respectively. Thus, ℐc(F, G), ℐr(F, G) emerge as numerical invariants of the ordered pair (F, G) and they may be computed by rank tests on Toeplitz matrices defined on (F, G).

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