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bbtoeplitz  Create a black-box operator for a Toeplitz matrix
   This function returns a black-box operator for a Toeplitz system:

   where C and R are the first column and row of the matrix. If only
   the first row is given, the system will be Hermitian.
   The first element of R and C must be identical.

   The matrix can be formed explicitly as A=toeplitz(C,R).

   See Also bbmult, bbsvds, bbsvdf, .