Derivatives and Integrals of Polynomials Associated with Integer Partitions

Integer partitions express the different ways that a positive integer may be written as a sum of positive integers. Here we explore the analytic properties of a new polynomial $f_λ(x)$ that we call the partition polynomial for the partition $λ$, with the aim to learn new properties of partitions. We prove a recursive formula for the derivatives of $f_λ(x)$ involving Stirling numbers of the second kind, show that the set of integrals from 0 to 1 of a normalized version of $f_λ(x)$ is dense in $[0,1/2]$, pose a few open questions, and formulate a conjecture relating the integral to the length of the partition. We also provide specific examples throughout to support our speculation that an in-depth analysis of partition polynomials could further strengthen our understanding of partitions.

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