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High-dimensional distribution generation through deep neural networks

Author

Listed:
  • Dmytro Perekrestenko

    (Ablacon Inc.)

  • Léandre Eberhard

    (Upstart Network Inc.)

  • Helmut Bölcskei

    (ETH Zurich)

Abstract

We show that every d-dimensional probability distribution of bounded support can be generated through deep ReLU networks out of a 1-dimensional uniform input distribution. What is more, this is possible without incurring a cost—in terms of approximation error measured in Wasserstein-distance—relative to generating the d-dimensional target distribution from d independent random variables. This is enabled by a vast generalization of the space-filling approach discovered in Bailey and Telgarsky (in: Bengio (eds) Advances in neural information processing systems vol 31, pp 6489–6499. Curran Associates, Inc., Red Hook, 2018). The construction we propose elicits the importance of network depth in driving the Wasserstein distance between the target distribution and its neural network approximation to zero. Finally, we find that, for histogram target distributions, the number of bits needed to encode the corresponding generative network equals the fundamental limit for encoding probability distributions as dictated by quantization theory.

Suggested Citation

  • Dmytro Perekrestenko & Léandre Eberhard & Helmut Bölcskei, 2021. "High-dimensional distribution generation through deep neural networks," Partial Differential Equations and Applications, Springer, vol. 2(5), pages 1-44, October.
    • Handle: RePEc:spr:pardea:v:2:y:2021:i:5:d:10.1007_s42985-021-00115-6
    DOI: 10.1007/s42985-021-00115-6
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