Linear Transformations Preserving the Strong $q$-log-convexity of Polynomials

Bao-Xuan Zhu, Hua Sun


In this paper, we give a sufficient condition for the linear transformation preserving the strong $q$-log-convexity. As applications, we get some linear transformations (for instance, Morgan-Voyce transformation, binomial transformation, Narayana transformations of two kinds) preserving the strong $q$-log-convexity. In addition, our results not only extend some known results, but also imply the strong $q$-log-convexities of some sequences of polynomials.


Log-concavity; Log-convexity; $q$-Log-convexity; Strong $q$-log-convexity

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