Blecher–Knopfmacher's fixed-point inequality for integer partitions
Let be a positive integer, and let denote the number of partitions of . A partition of , written , has a fixed point if for some index . Let be the number of partitions of with a fixed point and the number without a fixed point. Blecher–Knopfmacher's conjecture. For all , there are more partitions of without a fixed point than partitions of with a fixed point; equivalently,
The paper resolves this open question by proving the inequality and relating fixed points to Frobenius symbols, Dyson's crank, the mex, and other partition statistics.
References
Primary source
Brian Hopkins and James A. Sellers, “On Blecher and Knopfmacher's Fixed Points for Integer Partitions”, arXiv:2305.05096 (2023).
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