The Annals of Statistics

A Bernstein-type inequality for some mixing processes and dynamical systems with an application to learning

Hanyuan Hang and Ingo Steinwart

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Abstract

We establish a Bernstein-type inequality for a class of stochastic processes that includes the classical geometrically $\phi$-mixing processes, Rio’s generalization of these processes and many time-discrete dynamical systems. Modulo a logarithmic factor and some constants, our Bernstein-type inequality coincides with the classical Bernstein inequality for i.i.d. data. We further use this new Bernstein-type inequality to derive an oracle inequality for generic regularized empirical risk minimization algorithms and data generated by such processes. Applying this oracle inequality to support vector machines using the Gaussian kernels for binary classification, we obtain essentially the same rate as for i.i.d. processes, and for least squares and quantile regression; it turns out that the resulting learning rates match, up to some arbitrarily small extra term in the exponent, the optimal rates for i.i.d. processes.

Article information

Source
Ann. Statist., Volume 45, Number 2 (2017), 708-743.

Dates
Received: March 2015
Revised: March 2016
First available in Project Euclid: 16 May 2017

Permanent link to this document
https://projecteuclid.org/euclid.aos/1494921955

Digital Object Identifier
doi:10.1214/16-AOS1465

Mathematical Reviews number (MathSciNet)
MR3650398

Zentralblatt MATH identifier
06754748

Subjects
Primary: 60E15: Inequalities; stochastic orderings
Secondary: 60G10: Stationary processes 37D20: Uniformly hyperbolic systems (expanding, Anosov, Axiom A, etc.) 60F10: Large deviations 68T05: Learning and adaptive systems [See also 68Q32, 91E40] 62G08: Nonparametric regression 62M10: Time series, auto-correlation, regression, etc. [See also 91B84]

Keywords
Bernstein-type inequalities mixing processes dynamical systems nonparametric classification and regression support vector machines (SVMs)

Citation

Hang, Hanyuan; Steinwart, Ingo. A Bernstein-type inequality for some mixing processes and dynamical systems with an application to learning. Ann. Statist. 45 (2017), no. 2, 708--743. doi:10.1214/16-AOS1465. https://projecteuclid.org/euclid.aos/1494921955


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Supplemental materials

  • Supplement to “A Bernstein-type inequality for some mixing processes and dynamical systems with an application to learning”. The supplement [28] contains an Appendix, in which we provide the proofs for Sections 2 and 4.