Corpus ID: 227334362

Coefficientwise total positivity of some matrices defined by linear recurrences

@article{Chen2020CoefficientwiseTP,
  title={Coefficientwise total positivity of some matrices defined by linear recurrences},
  author={Xi Chen and Bishal Deb and Alexander Dyachenko and Tomack Gilmore and Alan D. Sokal},
  journal={arXiv: Combinatorics},
  year={2020}
}
We exhibit a lower-triangular matrix of polynomials $T(a,c,d,e,f,g)$ in six indeterminates that appears empirically to be coefficientwise totally positive, and which includes as a special case the Eulerian triangle. We prove the coefficientwise total positivity of $T(a,c,0,e,0,0)$, which includes the reversed Stirling subset triangle. 
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