# Search results for: Zbigniew Burdak

Opuscula Mathematica > 2021 > Vol. 41, no. 6 > 747--754

Integral Equations and Operator Theory > 2019 > 91 > 3 > 1-23

Journal of Mathematical Analysis and Applications > 2017 > 455 > 2 > 1706-1719

Linear Algebra and its Applications > 2017 > 516 > C > 167-185

Integral Equations and Operator Theory > 2014 > 79 > 1 > 107-122

*V*,

*V*′) of commuting, completely non doubly commuting isometries are studied. We show, that the space of the minimal unitary extension of

*V*(denoted by

*U*) is a closed linear span of subspaces reducing

*U*to bilateral shifts. Moreover, the restriction of

*V*′ to the maximal subspace reducing

*V*to a unitary operator is a unilateral shift. We also get a new hyperreducing decomposition of a single...

Bulletin des sciences mathematiques > 2013 > 137 > 5 > 653-658

Studia Mathematica > 2007 > 181 > 1 > 33-45

Annales Polonici Mathematici > 2004 > 84 > 2 > 121-135