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Inner-outer factorization for matrix-valued functions defined on totally ordered groups has been considered by Helson and Lowdenslager in connection with multivariate prediction theory. We discuss their result in an operator-theoretic framework and prove that there are obstructions to its extension to operator-valued functions.
Mihály Bakonyi, and Dan Timotin. "Inner-outer factorization of operator-valued functions on ordered groups." Studia Mathematica 169.3 (2005): 295-303. <http://eudml.org/doc/284604>.
@article{MihályBakonyi2005, abstract = {Inner-outer factorization for matrix-valued functions defined on totally ordered groups has been considered by Helson and Lowdenslager in connection with multivariate prediction theory. We discuss their result in an operator-theoretic framework and prove that there are obstructions to its extension to operator-valued functions.}, author = {Mihály Bakonyi, Dan Timotin}, journal = {Studia Mathematica}, keywords = {matrix-valued functions; inner-outer factorisation; multivariate prediction theory; operator-valued functions; ordered groups; semigroups of isometries}, language = {eng}, number = {3}, pages = {295-303}, title = {Inner-outer factorization of operator-valued functions on ordered groups}, url = {http://eudml.org/doc/284604}, volume = {169}, year = {2005}, }
TY - JOUR AU - Mihály Bakonyi AU - Dan Timotin TI - Inner-outer factorization of operator-valued functions on ordered groups JO - Studia Mathematica PY - 2005 VL - 169 IS - 3 SP - 295 EP - 303 AB - Inner-outer factorization for matrix-valued functions defined on totally ordered groups has been considered by Helson and Lowdenslager in connection with multivariate prediction theory. We discuss their result in an operator-theoretic framework and prove that there are obstructions to its extension to operator-valued functions. LA - eng KW - matrix-valued functions; inner-outer factorisation; multivariate prediction theory; operator-valued functions; ordered groups; semigroups of isometries UR - http://eudml.org/doc/284604 ER -