A group without fixed price
What the paper claims, in its own words
Constructs a finitely generated group with two essentially free probability-measure-preserving actions of different costs, answering the general fixed-price problem negatively. Its Bernoulli action has cost bounded away from one, while a sequence of finite height extensions has costs tending to one.
The plain-language explainer for this entry is still coming.
The original paper
- A group without fixed price (PDF, opens in a new tab) October 5, 2026