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Information geometry of Boltzmann machines

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3 Author(s)
Amari, S.-I. ; Dept. of Math. Eng., Tokyo Univ., Japan ; Kurata, K. ; Nagaoka, H.

A Boltzmann machine is a network of stochastic neurons. The set of all the Boltzmann machines with a fixed topology forms a geometric manifold of high dimension, where modifiable synaptic weights of connections play the role of a coordinate system to specify networks. A learning trajectory, for example, is a curve in this manifold. It is important to study the geometry of the neural manifold, rather than the behavior of a single network, in order to know the capabilities and limitations of neural networks of a fixed topology. Using the new theory of information geometry, a natural invariant Riemannian metric and a dual pair of affine connections on the Boltzmann neural network manifold are established. The meaning of geometrical structures is elucidated from the stochastic and the statistical point of view. This leads to a natural modification of the Boltzmann machine learning rule

Published in:

Neural Networks, IEEE Transactions on  (Volume:3 ,  Issue: 2 )

Date of Publication:

Mar 1992

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