Fixed-interval punishment1

Interval censored regression with fixed effects

This paper considers estimation of a fixed-effects model with an interval-censored dependent variable. In each time period, the researcher observes the interval (with known endpoints) in which the dependent variable lies but not the value of the dependent variable itself. Two versions of the model are considered, a parametric model with logistic errors and a semiparametric model with errors hav...

Interval Completion Is Fixed Parameter Tractable

We present an algorithm with runtime O(knm) for the following NP-complete problem [9, problem GT35]: Given an arbitrary graph G on n vertices and m edges, can we obtain an interval graph by adding at most k new edges to G? This resolves the long-standing open question [17, 7, 25, 14], first posed by Kaplan, Shamir and Tarjan, of whether this problem was fixed parameter tractable. The problem ha...

Unit Interval Editing is Fixed-Parameter Tractable

Given a graph G and integers k1, k2, and k3, the unit interval editing problem asks whether G can be transformed into a unit interval graph by at most k1 vertex deletions, k2 edge deletions, and k3 edge additions. We give an algorithm solving this problem in time 2 logk) · (n+m), where k := k1 +k2 +k3, and n,m denote respectively the numbers of vertices and edges of G. Therefore, it is fixed-pa...

Optimal Fixed Interval Satellite Range Scheduling

The satellite scheduling community has provided several algorithms for allocating interaction windows between ground stations and satellites, from simple greedy approaches to more complex hybrid-genetic or Lagrangian-relaxation techniques. Single-location ground station problems, where requests have fixed time intervals and no priorities, are known to be solvable in polynomial time. To the best...

Nonparametric fixed-interval smoothing with vector splines