Baily's strength versus Birch-rank conjecture

Let K\mathbb{K} be a field, let d2d\geq 2 be an integer, and let PK[x1,,xn]dP\in\mathbb{K}[x_1,\dots,x_n]_d be a homogeneous polynomial of degree dd. Suppose that

char(K)=0orchar(K)>d.\operatorname{char}(\mathbb{K})=0\quad\text{or}\quad\operatorname{char}(\mathbb{K})>d.

Here strK(P)\operatorname{str}_{\mathbb{K}}(P) denotes the strength of PP, and Brk(P)\operatorname{Brk}(P) denotes its Birch rank. Baily's strength versus Birch-rank conjecture. One has

strK(P)dBrk(P).\operatorname{str}_{\mathbb{K}}(P)\asymp_d\operatorname{Brk}(P).

The relation d\asymp_d denotes linear equivalence with constants depending on dd. The source says that the partition-rank versus analytic-rank conjecture implies this conjecture over finite fields; its general status is left open.

Sources & referencesView supporting material

Primary source

Qiyuan Chen and Ke Ye, “Geometry of multilinear varieties over infinite fields and its applications”, arXiv:2605.04859 (2026).

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