A ${\mathbb{Z}}_2$-Topological Framework for Sign-rank Lower Bounds

Florian Frick, Kaave Hosseini, Aliaksei Vasileuski

We develop a topological framework for proving lower bounds on sign-rank via ${\mathbb{Z}}_2$-equivariant topology, and use it to resolve the sign-rank of the Gap Hamming Distance pr…