Total Positivity of Almost-Riordan Arrays Total Positivity of Almost-Riordan Arrays

In this paper we study the total positivity of almost-Riordan arrays ( d ( t ) | g ( t ) , f ( t ) ) and establish its necessary conditions and sufficient conditions, particularly, for some well-used formal power series d ( t ). We present a semidirect product of an almost-array and use it to transf...

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