3 papers
cs.DS2025
Prize-Collecting Forest with Submodular Penalties: Improved Approximation
Ali Ahmadi, Iman Gholami, MohammadTaghi Hajiaghayi +2
Constrained forest problems form a class of graph problems where specific connectivity requirements for certain cuts within the graph must be satisfied by selecting the minimum-cos…
cs.DS2025
Breaking a Long-Standing Barrier: 2- Approximation for Steiner Forest
Ali Ahmadi, Iman Gholami, MohammadTaghi Hajiaghayi +2
The Steiner Forest problem, also known as the Generalized Steiner Tree problem, is a fundamental optimization problem on edge-weighted graphs where, given a set of vertex pairs, th…
cs.GT2024
Bi-Criteria Metric Distortion
Kiarash Banihashem, Diptarka Chakraborty, Shayan Chashm Jahan +4
Selecting representatives based on voters' preferences is a fundamental problem in social choice theory. While cardinal utility functions offer a detailed representation of prefere…