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 Computational Learning Theory


Characterizing the Multiclass Learnability of Forgiving 0-1 Loss Functions

arXiv.org Machine Learning

Classification is one of the most common tasks in machine learning. Within classification, there is normally a split between binary classification (only two possible outputs) and multiclass classification (more than two possible outputs). The theoretical analysis of these settings shares the same split. Under the P AC-learning model, binary classification learnability under the 0-1 loss is known to be characterized by the VC-dimension [V apnik and Chervonenkis, 1974, Shalev-Shwartz and Ben-David, 2014]. For multiclass classification, there has also been a further split between finite and infinite label cases.










Smoothed Analysis of Sequential Probability Assignment

Neural Information Processing Systems

Our approach establishes a general-purpose reduction from minimax rates for sequential probability assignment for smoothed adversaries to minimax rates for transductive learning. This leads to optimal (logarithmic) fast rates for parametric classes and classes with finite VC dimension.