'It was like a phone call suddenly connecting' Ai Weiwei. 'It was like a phone call suddenly connecting' Ai Weiwei. 'Was I scared going back to China? He has been jailed, tracked and threatened by China's government. What was it like pay a visit home?

Asinterventions areexpensive(require carefully controlled experiments) andperforming multiple interventions is time-consuming, an important goal in causal discovery is to design algorithms that utilize simple (preferably, single variable) and fewer interventions [Shanmugam et al.,2015]. However, when there are latents or unobserved variables in the system, in the worst-case, it is not possible to learn the exact causal DAG without intervening on every variable at least once.

In recent years, the Lottery Ticket Hypothesis (LTH) [1] has drawn great attention and thorough researchefforts.

Proposition 2. Let X be some set andC be any collection of subsets ofX.

We study the preference-based pure exploration problem for bandits with vector-valued rewards.