Pengsheng Ji

activity

20102024

most citedCoauthorship and Citation Networks for Statisticians

136 citations · 223 across the 8 of their papers we have counts for

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2 papers · 1 filter

math.ST2012★ 1 cited

Sharp adaptive nonparametric testing for Sobolev ellipsoids

Pengsheng Ji, Michael Nussbaum

We consider testing for presence of a signal in Gaussian white noise with intensity 1/sqrt(n), when the alternatives are given by smoothness ellipsoids with an L2-ball of (squared)…

math.ST2010★ 47 cited

UPS delivers optimal phase diagram in high-dimensional variable selection

Pengsheng Ji, Jiashun Jin

Consider a linear model $Y = X β + z$ , $z \sim N (0, I_{n})$ . Here, $X = X_{n, p}$ , where both $p$ and $n$ are large, but $p > n$ . We model the rows of $X$ as i.i.d. samples from $N(0,\frac{1}{n}…