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The main result of the paper is that for a circular element c in a C*-probability space, is an R-diagonal pair in the sense of Nica and Speicher for every n = 1,2,... The coefficients of the R-series are found to be the generalized Catalan numbers of parameter n-1.
Ferenc Oravecz. "On the powers of Voiculescu's circular element." Studia Mathematica 145.1 (2001): 85-95. <http://eudml.org/doc/285360>.
@article{FerencOravecz2001, abstract = {The main result of the paper is that for a circular element c in a C*-probability space, $(cⁿ,c^\{n*\})$ is an R-diagonal pair in the sense of Nica and Speicher for every n = 1,2,... The coefficients of the R-series are found to be the generalized Catalan numbers of parameter n-1.}, author = {Ferenc Oravecz}, journal = {Studia Mathematica}, keywords = {-probability space; generalized Catalan numbers}, language = {eng}, number = {1}, pages = {85-95}, title = {On the powers of Voiculescu's circular element}, url = {http://eudml.org/doc/285360}, volume = {145}, year = {2001}, }
TY - JOUR AU - Ferenc Oravecz TI - On the powers of Voiculescu's circular element JO - Studia Mathematica PY - 2001 VL - 145 IS - 1 SP - 85 EP - 95 AB - The main result of the paper is that for a circular element c in a C*-probability space, $(cⁿ,c^{n*})$ is an R-diagonal pair in the sense of Nica and Speicher for every n = 1,2,... The coefficients of the R-series are found to be the generalized Catalan numbers of parameter n-1. LA - eng KW - -probability space; generalized Catalan numbers UR - http://eudml.org/doc/285360 ER -