Discrete Dirac system: rectangular Weyl functions, direct and inverse   problems
  A transfer matrix function representation of the fundamental solution of the general-type discrete Dirac system, corresponding to rectangular Schur coefficients and Weyl functions, is obtained. Connections with Szeg\"o recurrence, Schur coefficients and structured matrices are treated. Borg-Marchenko-type uniqueness theorem is derived. Inverse problems on the interval and semiaxis are solved. 
B. Fritzsche, B. Kirstein, I. Roitberg, A. L. Sakhnovich
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