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Geodetic Set on Graphs of Constant Pathwidth and Feedback Vertex Set Number

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arxiv 2504.17862 v1 pith:QPDVJPJ5 submitted 2025-04-24 cs.DS cs.CC

classification cs.DScs.CC
keywords graphproblemvertexfeedbacknumberpathwidthconstantgeodetic
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abstract

In the \textsc{Geodetic Set} problem, the input consists of a graph $G$ and a positive integer $k$. The goal is to determine whether there exists a subset $S$ of vertices of size $k$ such that every vertex in the graph is included in a shortest path between two vertices in $S$. Kellerhals and Koana [IPEC 2020; J. Graph Algorithms Appl 2022] proved that the problem is $\W[1]$-hard when parameterized by the pathwidth and the feedback vertex set number of the input graph. They posed the question of whether the problem admits an $\XP$ algorithm when parameterized by the combination of these two parameters. We answer this in negative by proving that the problem remains \NP-hard on graphs of constant pathwidth and feedback vertex set number.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Hitting Geodesic Intervals in Structurally Restricted Graphs

    cs.DS 2025-09 conditional novelty 7.0 of 10

    Hitting Geodesic Intervals is NP-complete on graphs that are almost disjoint paths or triangles, yet becomes fixed-parameter tractable when the solution size is combined with modular-width, vertex integrity, or multiw...

  2. Distance-based (and path-based) covering problems for graphs of given cyclomatic number

    cs.DM 2025-08 conditional novelty 6.0 of 10

    For every connected graph, the distance-edge-monitoring number is at most the cyclomatic number plus one, and similar linear bounds hold for metric dimension, geodetic number, and isometric path covers.

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