2 problems

Let $\theta^*\in\mathbb{R}^n$ be a signal satisfying the minimum length condition, and let nearly-isotonic regression denote the corresponding constrained estimator with tuning par…

Let $G=(V,E)$ be a graph with $n=|V|$ vertices, let $\theta_0$ be the mean in the model, and let $Z(\theta_0)\subseteq E$ be the set of edges whose endpoint values agree. Define th…