25 citations · 57 across the 24 of their papers we have counts for
23 papers · 1 filter
Online and Incremental Fractional Vertex Cover on Trees
Júlia Baligács, Bartłomiej Bosek, Yann Disser +5
In this paper we study the fractional vertex cover problem on trees in two related models: online and incremental. In the online model, the vertices of the tree are known a priori…
Incremental Submodular Maximization: Better Than Greedy
Marcin Bienkowski, Joakim Blikstad, Jarosław Byrka +3
We consider submodular maximization under increasing cardinality constraint and ask for a good incremental solution, i.e., an ordering of the ground set such that each prefix of th…
Incremental-Decremental Maximization
Yann Disser, Max Klimm, Annette Lutz +1
We introduce a framework for incremental-decremental maximization that captures the gradual transformation or renewal of infrastructures. In our model, an initial solution is trans…
Bicriterial Approximation for the Incremental Prize-Collecting Steiner-Tree Problem
Yann Disser, Svenja M. Griesbach, Max Klimm +1
We consider an incremental variant of the rooted prize-collecting Steiner-tree problem with a growing budget constraint. While no incremental solution exists that simultaneously ap…
A -Approximation for Tricolored Non-crossing Euclidean TSP
Júlia Baligács, Yann Disser, Andreas Emil Feldmann +1
In the Tricolored Euclidean Traveling Salesperson problem, we are given~ sets of points in the plane and are looking for disjoint tours, each covering one of the sets. Arora (…
Exploration of graphs with excluded minors
Julia Baligacs, Yann Disser, Irene Heinrich +1
We study the online graph exploration problem proposed by Kalyanasundaram and Pruhs (1994) and prove a constant competitive ratio on minor-free graphs. This result encompasses and…
Incremental Maximization via Continuization
Yann Disser, Max Klimm, Kevin Schewior +1
We consider the problem of finding an incremental solution to a cardinality-constrained maximization problem that not only captures the solution for a fixed cardinality, but also d…
An Improved Algorithm for Open Online Dial-a-Ride
Julia Baligacs, Yann Disser, Nils Mosis +1
We consider the open online dial-a-ride problem, where transportation requests appear online in a metric space and need to be served by a single server. The objective is to minimiz…
Tight analysis of the lazy algorithm for open online dial-a-ride
Julia Baligacs, Yann Disser, Farehe Soheil +1
In the open online dial-a-ride problem, a single server has to deliver transportation requests appearing over time in some metric space, subject to minimizing the completion time.…
On Sparse Hitting Sets: from Fair Vertex Cover to Highway Dimension
Johannes Blum, Yann Disser, Andreas Emil Feldmann +2
We consider the Sparse Hitting Set (Sparse-HS) problem, where we are given a set system with two families of subsets of .…
Fractionally Subadditive Maximization under an Incremental Knapsack Constraint
Yann Disser, Max Klimm, Annette Lutz +1
We consider the problem of maximizing a fractionally subadditive function under a knapsack constraint that grows over time. An incremental solution to this problem is given by an o…
Efficient fully dynamic elimination forests with applications to detecting long paths and cycles
Jiehua Chen, Wojciech Czerwiński, Yann Disser +8
We present a data structure that in a dynamic graph of treedepth at most , which is modified over time by edge insertions and deletions, maintains an optimum-height elimination…
Improved Lower Bound for Competitive Graph Exploration
Alexander Birx, Yann Disser, Alexander V. Hopp +1
We give an improved lower bound of 10/3 on the competitive ratio for the exploration of an undirected, edge-weighted graph with a single agent that needs to return to the starting…
Travelling on Graphs with Small Highway Dimension
Yann Disser, Andreas Emil Feldmann, Max Klimm +1
We study the Travelling Salesperson (TSP) and the Steiner Tree problem (STP) in graphs of low highway dimension. This graph parameter was introduced by Abraham et al. [SODA 2010] a…
Tight bounds for undirected graph exploration with pebbles and multiple agents
Yann Disser, Jan Hackfeld, Max Klimm
We study the problem of deterministically exploring an undirected and initially unknown graph with vertices either by a single agent equipped with a set of pebbles, or by a set…
Distance-preserving graph contractions
Aaron Bernstein, Karl Däubel, Yann Disser +3
Compression and sparsification algorithms are frequently applied in a preprocessing step before analyzing or optimizing large networks/graphs. In this paper we propose and study a…
Robust and adaptive search
Yann Disser, Stefan Kratsch
Binary search finds a given element in a sorted array with an optimal number of queries. However, binary search fails even when the array is only slightly disordered or ac…
Scheduling Maintenance Jobs in Networks
Fidaa Abed, Lin Chen, Yann Disser +5
We investigate the problem of scheduling the maintenance of edges in a network, motivated by the goal of minimizing outages in transportation or telecommunication networks. We focu…
Energy-efficient Delivery by Heterogeneous Mobile Agents
Andreas Bärtschi, Jérémie Chalopin, Shantanu Das +4
We consider the problem of delivering messages between specified source-target pairs in a weighted undirected graph, by mobile agents initially located at distinct nodes of…
Collaborative Delivery with Energy-Constrained Mobile Robots
Andreas Bärtschi, Jérémie Chalopin, Shantanu Das +5
We consider the problem of collectively delivering some message from a specified source to a designated target location in a graph, using multiple mobile agents. Each agent has a l…
Hiring Secretaries over Time: The Benefit of Concurrent Employment
Yann Disser, John Fearnley, Martin Gairing +5
We consider a stochastic online problem where applicants arrive over time, one per time step. Upon arrival of each applicant their cost per time step is revealed, and we have t…
Scheduling Bidirectional Traffic on a Path
Yann Disser, Max Klimm, Elisabeth Lübbecke
We study the fundamental problem of scheduling bidirectional traffic along a path composed of multiple segments. The main feature of the problem is that jobs traveling in the same…
Packing a Knapsack of Unknown Capacity
Yann Disser, Max Klimm, Nicole Megow +1
We study the problem of packing a knapsack without knowing its capacity. Whenever we attempt to pack an item that does not fit, the item is discarded; if the item fits, we have to…