Sivan Sabato, Nathan Srebro, Naftali Tishby. Tight Sample Complexity of Large-margin Learning

Natural Sciences / Computer Science / Analysis of algorithms

Submitted on: Aug 24, 2012, 19:19:12

Description: We obtain a tight distribution-specific characterization of the sample complexity of large-margin classification with L_2 regularization: We introduce the gamma-adapted-dimension, which is a simple function of the spectrum of a distribution's covariance matrix, and show distribution-specific upper and lower bounds on the sample complexity, both governed by the gamma-adapted-dimension of the source distribution. We conclude that this new quantity tightly characterizes the true sample complexity of large-margin classification. The bounds hold for a rich family of sub-Gaussian distributions.

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