覆盖图、电压图与带号图的临界群
组合数学
2020-06-09 v3
摘要
已知图的覆盖会诱导其临界群的满射。这里我们用参数化覆盖的数据来描述这些态射的核。正则覆盖由电压图参数化,上述核可以与一个自然定义的电压图临界群相等同。对于二重覆盖,电压图是一个带号图,此时该理论呈现出特别优美的形式,并进而导出了带号图的二重覆盖理论。
引用
@article{arxiv.1301.2977,
title = {Critical groups of covering, voltage, and signed graphs},
author = {Victor Reiner and Dennis Tseng},
journal= {arXiv preprint arXiv:1301.2977},
year = {2020}
}
备注
Version 3 fixes a typo, and adds some details in the proof of Theorem 1.1