Applications spam detection(online classification/regression):At each timet=1,2,... ·receive an email xt∈R, ·predict whether it is a spam∈{-l,+li SPAM 。see its true label y∈{-1，+1l} aggregating weather prediction(the expert problem):At each day t=1,2,... obtain temperature predictions from N models; make the final prediction by randomly following a model according to the probability p∈△w; on the next day observe the loss of each model f0,1]N. Advanced Optimization(Fall 2023) Lecture 5.Online Convex Optimization 10Advanced Optimization (Fall 2023) Lecture 5. Online Convex Optimization 10 Applications