The extremal matrix problem of symmetric primitive matrices has been completely solved in [Sci. Sinica Ser.A 9(1986) 931-939] and [Linear Algebra Appl.133(1990) 121-131]. In this paper, we determine the maximum exponent in the class of central symmetric primitive matrices, and give a complete characterization of those central symmetric primitive matrices whose exponents actually attain the maximum exponent.
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