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math.ST2024
Locally sharp goodness-of-fit testing in sup norm for high-dimensional counts
Subhodh Kotekal, Julien Chhor, Chao Gao
We consider testing the goodness-of-fit of a distribution against alternatives separated in sup norm. We study the twin settings of Poisson-generated count data with a large number…
math.ST2021
Minimax rates for sparse signal detection under correlation
Subhodh Kotekal, Chao Gao
We fully characterize the nonasymptotic minimax separation rate for sparse signal detection in the Gaussian sequence model with equicorrelated observations, generalizing a resu…