2 papers
math.PR2026
The exact group-sparse recovery for block diagonal matrices with subexponential entries
Guozheng Dai, Tiankun Diao, Hanchao Wang
We study block-diagonal random matrices with i.i.d. subexponential entries and show that, despite their highly structured form, they already guarantee exact sparse recovery from a…
math.PR2026
Uniform Concentration for -subexponential Random Operators
Tiankun Diao, Xuanang Hu, Vladimir V. Ulyanov +1
Random matrices acting on structured sets play a fundamental role in high-dimensional geometry, compressed sensing, and randomized algorithms. Existing results primarily focus on s…