Arsenal's match against Fleetwood Town in the last-16 of the Carabao Cup was delayed for more than eight minutes after a drone was flown above the stadium while play was ongoing. Referee Michael Salisbury stopped proceedings with one minute and 40 seconds on the clock after spotting the drone flying above the pitch while Arsenal waited to take a free-kick at Highbury Stadium. The game was halted while the referee spoke to the management and staff on both benches, with police also investigating. The match got back under way with 10 minutes on the clock. A commentator for Sky later said police had located the drone operator.

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For additional motivation, it is reasonable to consider Massart noise to be a more realistic model of real-life noise (even when benign) when compared to the RCN model, as it allows for some amount of non-uniformity. This made Definition 1 a possibly tractable way to relax the noise assumption, without running intotheaforementioned computational barriers foragnostic learning.

We give the first polynomial-time algorithm for robust regression in the listdecodable setting where an adversary can corrupt a greater than1/2 fraction ofexamples.

On the positive side, we give anα = 1.01-approximate proper learner that uses O(1/( 2γ2)) samples (which is optimal) and runs in timepoly(d/) 2 O(1/γ

Given 2 (0,12] and 2 (0,1), letT bethesamplesetgiventothe learner.

In the first model, we are givenn i.i.d.

In the first model, we are givenn i.i.d.

Insuch situations, weallowthealgorithm toreturn asmall listofcandidates such that one of the candidates is close to the true parameter.

Inthisbasicsetting, linear regression is well-understood.