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bbhankel Create a black-box operator for a Hankel matrix. BB=bbhankel(C,R) creates a black-box operator corresponding to a Hankel-matrix whose first column is C and last row R. The least element of C must be the same as the first element of R. BB=bbhankel(C) is the square Hankel-matrix produced when R is zero, except for the first element. See also bbtoeplitz, .