2.6. Which of the following matrices are Toeplitz?

What is special about matrices

c, d,

e, and f?

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3 2 1 2 3 3 2 1 [1 2 3] a. 4 3 2, b. 12 3, c. 111, d. 2 12,e. 2 12 543 1 2 3 (1+j) (1-j) f. (1-j) 1 [(1+j) (1-j) 1 (1+j) 1 1 1 1 2 3 3 2 1