Faster Johnson–Lindenstrauss transforms via Kronecker products
Journal Article
·
· Information and Inference (Online)
- Univ. of Texas, Austin, TX (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
The Kronecker product is an important matrix operation with a wide range of applications in signal processing, graph theory, quantum computing and deep learning. In this work, we introduce a generalization of the fast Johnson–Lindenstrauss projection for embedding vectors with Kronecker product structure, the Kronecker fast Johnson–Lindenstrauss transform (KFJLT). The KFJLT reduces the embedding cost by an exponential factor of the standard fast Johnson–Lindenstrauss transform’s cost when applied to vectors with Kronecker structure, by avoiding explicitly forming the full Kronecker products. Here, we prove that this computational gain comes with only a small price in embedding power: consider a finite set of $$p$$ points in a tensor product of $$d$$ constituent Euclidean spaces $$\bigotimes _{k=d}^{1}{\mathbb{R}}^{n_k}$$, and let $$N = \prod _{k=1}^{d}n_k$$. With high probability, a random KFJLT matrix of dimension $$m \times N$$ embeds the set of points up to multiplicative distortion $$(1\pm \varepsilon )$$ provided $$m \gtrsim \varepsilon ^{-2} \, \log ^{2d - 1} (p) \, \log N$$. We conclude by describing a direct application of the KFJLT to the efficient solution of large-scale Kronecker-structured least squares problems for fitting the CP tensor decomposition.
- Research Organization:
- Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1738933
- Report Number(s):
- SAND--2020-13781J; 692879
- Journal Information:
- Information and Inference (Online), Journal Name: Information and Inference (Online) Journal Issue: 4 Vol. 10; ISSN 2049-8772
- Publisher:
- Oxford University PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Structured Random Sketching for PDE Inverse Problems
|
journal | January 2020 |
| Practical Leverage-Based Sampling for Low-Rank Tensor Decomposition | preprint | January 2020 |
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