Arbitrary-peak conjecture for rank-generating functions

Let Fλ(q)F_{\lambda}(q) be the rank-generating function for partitions contained inside a partition λ\lambda. A polynomial is unimodal if its coefficients weakly increase and then weakly decrease; a peak is a local maximum in its coefficient sequence. Arbitrary-peak conjecture. For every integer N2N\ge 2, there exists a partition λ\lambda such that Fλ(q)F_{\lambda}(q) is nonunimodal with (exactly?) NN peaks. The parenthetical qualification is part of the source statement, so it is unclear whether the intended assertion is exactly NN peaks or merely NN peaks; no resolution is supplied.

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Primary source

Richard P. Stanley and Fabrizio Zanello, “Unimodality of partitions with distinct parts inside Ferrers shapes”, arXiv:1305.6083 (2015).

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