Dice Question Streamline Icon: https://streamlinehq.com

m-ary Sensitivity Conjecture

Establish a polynomial upper bound on the polynomial degree of an m-ary function f: T^n → T (with |T| = m) in terms of its sensitivity s(f); specifically, determine whether for every integer m there exists a constant c such that deg(f) ∈ O(s(f)^c) for every m-ary function f.

Information Square Streamline Icon: https://streamlinehq.com

Background

The classical sensitivity conjecture for Boolean functions was resolved by Huang via a graph-theoretic reformulation. This paper extends sensitivity, block sensitivity, and degree to m-ary functions f: Tn → T and proves the upper bound s(f) = O((deg f)2). The challenging direction is to bound deg(f) polynomially by s(f), prompting the generalization stated here.

The authors also develop an equivalence theorem connecting this conjecture to low-degree partitions of Hamming graphs, and they show a quadratic separation (deg(f) ∈ Ω(s(f)2)) for p-ary functions with p prime, implying that any valid exponent c must be at least 2.

References

We conjecture a polynomial relation into the other direction: For every m there exists a constant c such that (f)\in \mathcal O(s(f)c) for every m-ary function f.

Sensitivity of $m$-ary functions and low degree partitions of Hamming graphs (2409.16141 - Asensio et al., 24 Sep 2024) in Section 3: An upper bound for the sensitivity in terms of the degree (Conjecture \ref{conj:sensit})