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arXiv · 1910.10692

Deterministic tensor completion with hypergraph expanders

Kameron Decker Harris·Yizhe Zhu
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Abstract

We provide a novel analysis of low-rank tensor completion based on hypergraph expanders. As a proxy for rank, we minimize the max-quasinorm of the tensor, which generalizes the max-norm for matrices. Our analysis is deterministic and shows that the number of samples required to approximately recover an order-$t$ tensor with at most $n$ entries per dimension is linear in $n$, under the assumption that the rank and order of the tensor are $O(1)$. As steps in our proof, we find a new expander mixing lemma for a $t$-partite, $t$-uniform regular hypergraph model, and prove several new properties about tensor max-quasinorm. To the best of our knowledge, this is the first deterministic analysis of tensor completion. We develop a practical algorithm that solves a relaxed version of the max-quasinorm minimization problem, and we demonstrate its efficacy with numerical experiments.

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Kameron Decker Harris, Yizhe Zhu. 2019-10-23. Deterministic tensor completion with hypergraph expanders. https://doi.org/10.1137/20m1379745

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