Kernel for Proper Helly Circular-Arc Vertex Deletion: Smaller and Simpler via Graph Isomorphism
摘要
The modification problems toward subclasses of claw-free graphs have been investigated a lot in recent years. Proper Helly circular-arc graph is an important subclass of claw-free graphs. In this paper, we give an \(O(k^8)\) vertex-kernel for proper Helly circular-arc vertex deletion, which is much better than the \(O(k^{88})\) vertex-kernel [LATIN 24]. Our kernelization is based on small graph enumeration and isomorphism, which may be helpful for other graph classes with large forbidden induced subgraphs.