Szukana fraza: [Abstract = "A geometric interpretation of invariant zeros of MIMO LTI discrete\-time systems is provided. The zeros are treated as the triples\: complex number, state zero direction, input zero direction. Such a treatment is strictly connected with the output zeroing problem and in that spirit the zeros can be easily interpreted even in the degenerate case \(i.e. when each complex number constitutes an invariant zero\)."]