** Hankel matrix. **

** HANKEL(C) is a square Hankel matrix whose first column is C and **

** whose elements are zero below the first anti-diagonal. **

** HANKEL(C,R) is a Hankel matrix whose first column is C and whose **

** last row is R. **

** Hankel matrices are symmetric, constant across the anti-diagonals, **

** and have elements H(i,j) = R(i+j-1). **

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** **

** See also TOEPLITZ . **

** **