English

Convergence and asymptotic freeness of missing data matrices

Probability 2025-08-15 v1

Abstract

We consider a random matrix of the form DnXnD_n \odot X_n (known as a variance profile matrix), where \odot denotes the Hadamard product of the two matrices, DnD_n is a deterministic matrix, and XnX_n is a random matrix. We call DnXnD_n\odot X_n as a missing data matrix of XnX_n when the entries of DnD_n are either 00 or 11. This framework is commonly used in various applied fields, such as biology, neuroscience, and network data analysis. We study the convergence and asymptotic freeness of missing data matrices of iid, elliptic, and covariance random matrices. Specifically, it is known that independent iid, elliptic, and covariance matrices converge to freely independent circular, elliptic, and Mar\v{c}enko-Pastur variables, respectively. In this article, we provide the necessary and sufficient conditions on deterministic matrices DnD_n for which these results hold true for independent missing data matrices of these three types of random matrices.

Keywords

Cite

@article{arxiv.2508.10610,
  title  = {Convergence and asymptotic freeness of missing data matrices},
  author = {Kartick Adhikari and Dev Ahir},
  journal= {arXiv preprint arXiv:2508.10610},
  year   = {2025}
}