Ballantine--Burson--Craig--Folsom--Wen hook length bias conjecture for self-conjugate partitions

From papers

For each nn, let SC(n)\mathcal{SC}(n) be the set of self-conjugate partitions of nn, let DO(n)\mathcal{DO}(n) be the set of partitions of nn with distinct odd parts, and let nt(λ)n_t(\lambda) denote the number of hooks of length tt in a partition λ\lambda. Define

at(n):=λSC(n)nt(λ),bt(n):=λDO(n)nt(λ).a_t^*(n):=\sum_{\lambda\in\mathcal{SC}(n)}n_t(\lambda),\qquad b_t^*(n):=\sum_{\lambda\in\mathcal{DO}(n)}n_t(\lambda).

Ballantine--Burson--Craig--Folsom--Wen hook length bias conjecture. For every integer t2t\geq 2, both of the following hold:

  1. There exists an integer NtN_t^* such that at(n)bt(n)a_t^*(n)\geq b_t^*(n) for all n>Ntn>N_t^*.
  2. There exists a constant γt>1\gamma_t^*>1 such that
at(n)bt(n)γtas n.\frac{a_t^*(n)}{b_t^*(n)}\longrightarrow\gamma_t^* \quad\text{as }n\longrightarrow\infty.

The conjecture formulates the eventual hook-length bias between self-conjugate partitions and partitions with distinct odd parts; the source says that Craig, Dawsey, and Han proved the corresponding conjecture, so both assertions are solved.

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Sources & referencesView supporting material

Primary source

Catherine Cossaboom, “Hook length biases for self-conjugate partitions and partitions with distinct odd parts”, arXiv:2406.18480 (2024).

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