11/21/2007, 07:49 PM
andydude Wrote:Ok, so the identity:
\( (I + Bb^{-1})^{-1} + (I + Bb)^{-1} = I \)
holds true for all matrices, not just the Bell matrix of exponentials.
Good to know.
Andrew Robbins
Regularly invertible matrices (for instance of finite size); and I think, that even infinite matrices can be included, if they are triangular (row- or column-finite) or, if not triangular, at least if some other condition holds (on their eigenvalues or the like). I'll have to perform some more tests...
Gottfried Helms, Kassel
