2 papers
stat.ML2026
Distinguishability and Recovery for a Doubly Sparse Spiked Wigner Model
Ioana Dumitriu, JD Flynn, Zhichao Wang
We study distinguishability and recovery of a sparse rank-one signal in a spiked Wigner model with independently sparse noise through a variety of algorithms and parameter regimes.…
math.PR2026
BBP Phase Transition for a Doubly Sparse Deformed Model
Ioana Dumitriu, JD Flynn, Zhichao Wang
We prove the equivalent of the Baik, Ben Arous, Péché (2004) phenomenon for a novel, doubly sparse model where both the Wigner noise matrix and signal vector(s) are sparse. Specifi…