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On the foundations of signed graphs: Chain groups, matroids, and characteristic polynomials.

发布时间：2024-12-30 作者：浏览次数：

Speaker:	陈北方教授	DateTime:	2024年12月30日（周一）下午16:00-17:00
Brief Introduction to Speaker: 陈北方教授，香港科技大学		Place:	国交2号楼201会议室
Abstract:We modify Tutte's chain group to study signed graphs so that all fundamental concepts and results on signed graphs appear in a natural way. In particular, signed graphs viewed as the simplest non-regular matoids, the method can be modified to further study non-regular matroids more btroadly.