2012

Simultaneously Structured Models with Application to Sparse and Low-rank Matrices

Oymak, Samet, Jalali, Amin, Fazel, Maryam et al.

Understand

The topic of recovery of a structured model given a small number of linear observations has been well-studied in recent years.

  • Examples include recovering sparse or group-sparse vectors, low-rank matrices, and the sum of sparse and low-rank matrices, among others.
  • In various applications in signal processing and machine learning, the model of interest is known to be structured in several ways at the same time, for example, a matrix that is simultaneously sparse and low-rank.
  • Often norms that promote each individual structure are known, and allow for recovery using an order-wise optimal number of measurements (e.g., $\ell_1$ norm for sparsity, nuclear norm for matrix rank).

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