
handle: 11562/409547
Given a family \(S\) of oriented stars, an \(S\)-packing in a digraph \(D\) is a collection of vertex disjoint subgraphs of \(D\), each of which is isomorphic to a member of \(S\). The \(S\)-packing problem is to ascertain the maximum number of vertices of a host \(D\) that can be covered by an \(S\)-packing of \(D\). The paper shows a dichotomy for the decision version of the \(S\)-packing problem, giving an exact classification of which problems are polynomial time solvable and which are NP-complete. For the polynomial problem, it provides Hall type min-max theorems, including versions for locally degree-constrained variants of the problems. It also shows that the \(S\)-packing problem is polynomial for some \(S\) and NP-complete otherwise.
packing problem, Good characterization, Directed graphs (digraphs), tournaments, min-max theorem, Packing problems, good characterization, Theoretical Computer Science, Oriented stars; Packing problems; Min-max theorems; Good characterization, Computational Theory and Mathematics, Edge subsets with special properties (factorization, matching, partitioning, covering and packing, etc.), oriented star, Discrete Mathematics and Combinatorics, Min-max theorems, Oriented stars
packing problem, Good characterization, Directed graphs (digraphs), tournaments, min-max theorem, Packing problems, good characterization, Theoretical Computer Science, Oriented stars; Packing problems; Min-max theorems; Good characterization, Computational Theory and Mathematics, Edge subsets with special properties (factorization, matching, partitioning, covering and packing, etc.), oriented star, Discrete Mathematics and Combinatorics, Min-max theorems, Oriented stars
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