TY - JOUR ID - Zygmunt2016 LB - Zygmunt2016 AU - Zygmunt, Marcin J. TI - Matrix polynomials orthogonal with respect to a non-symmetric matrix of measures ST - Matrix polynomials orthogonal with respect to a non-symmetric matrix of measures JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2016 VL - 36 IS - 3 SP - 409 EP - 423 DO - http://dx.doi.org/10.7494/OpMath.2016.36.3.409 UR - http://dx.doi.org/10.7494/OpMath.2016.36.3.409 AB - The paper focuses on matrix-valued polynomials satisfying a three-term recurrence relation with constant matrix coefficients. It is shown that they form an orthogonal system with respect to a matrix of measures, not necessarily symmetric. Moreover, it is stated the condition on the coefficients of the recurrence formula for which the matrix measure is symmetric. KW - matrix orthogonal polynomials KW - recurrence formula KW - matrix of measures KW - block Jacobi matrices SN - 1232-9274 ER -