Almost Linear VC-Dimension Bounds for Piecewise Polynomial Networks

Author:

Bartlett Peter L.1,Maiorov Vitaly2,Meir Ron3

Affiliation:

1. Department of System Engineering, Australian National University, Canberra, ACT 0200, Australia

2. Department of Mathematics, Technion, Haifa 32000, Israel

3. Department of Electrical Engineering, Technion, Haifa 32000, Israel

Abstract

We compute upper and lower bounds on the VC dimension and pseudodimension of feedforward neural networks composed of piecewise polynomial activation functions. We show that if the number of layers is fixed, then the VC dimension and pseudo-dimension grow as W log W, where W is the number of parameters in the network. This result stands in opposition to the case where the number of layers is unbounded, in which case the VC dimension and pseudo-dimension grow as W2. We combine our results with recently established approximation error rates and determine error bounds for the problem of regression estimation by piecewise polynomial networks with unbounded weights.

Publisher

MIT Press - Journals

Subject

Cognitive Neuroscience,Arts and Humanities (miscellaneous)

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