Enumerative combinatorics
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In this paper, we are going to study some additional relations between the Stirling matrix S"n and the Pascal matrix P"n. Also the representation for the matrix T"n and T"n^-^1 in terms of s"n and S"n will be considered. Consequently, this will give an answer to an open problem proposed by EI-Mikkawy [On a connection between the Pascal, Vandermonde and Stirling matrices-II, Appl. Math. Comput. 146 (2003) 759-769].