### Abstract

Consider a graph such that each vertex has a nonnegative integer capacity and each edge has a positive integer weight. Then, a b-matching in the graph is a multi-set of edges (represented by an integer vector on edges) such that the total number of edges incident to each vertex is at most the capacity of the vertex. In this paper, we study a reconfiguration variant for maximum-weight b-matchings: For two given maximum-weight b-matchings in a graph, we are asked to determine whether there exists a sequence of maximum-weight b-matchings in the graph between them, with subsequent b-matchings obtained by removing one edge and adding another. We show that this reconfiguration problem is solvable in polynomial time for instances with no integrality gap. Such instances include bipartite graphs with any capacity function on vertices, and 2-matchings in general graphs. Thus, our result implies that the reconfiguration problem for maximum-weight matchings can be solved in polynomial time for bipartite graphs.

Original language | English |
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Title of host publication | Computing and Combinatorics - 23rd International Conference, COCOON 2017, Proceedings |

Editors | Yixin Cao, Jianer Chen |

Publisher | Springer Verlag |

Pages | 287-296 |

Number of pages | 10 |

ISBN (Print) | 9783319623887 |

DOIs | |

Publication status | Published - Jan 1 2017 |

Event | 23rd International Conference on Computing and Combinatorics, COCOON 2017 - Hong Kong, China Duration: Aug 3 2017 → Aug 5 2017 |

### Publication series

Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 10392 LNCS |

ISSN (Print) | 0302-9743 |

ISSN (Electronic) | 1611-3349 |

### Other

Other | 23rd International Conference on Computing and Combinatorics, COCOON 2017 |
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Country | China |

City | Hong Kong |

Period | 8/3/17 → 8/5/17 |

### All Science Journal Classification (ASJC) codes

- Theoretical Computer Science
- Computer Science(all)

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## Cite this

*Computing and Combinatorics - 23rd International Conference, COCOON 2017, Proceedings*(pp. 287-296). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10392 LNCS). Springer Verlag. https://doi.org/10.1007/978-3-319-62389-4_24