演講公告

演講主題：Embedded graphs, Eulerian digraphs, and their Jacobian groups
主講人：Donggyu Kim 教授 (韓國漢陽大學)
演講日期：2026年10月13日(二) 14:00 –15:00
演講地點：(光復校區) 科學一館213室
摘要內容：
Abstract. The celebrated Kirchhoff matrix-tree theorem connects a combinatorial quantity---the number of spanning trees of a graph---with an algebraic one---the determinant of its reduced Laplacian matrix. This theorem has analogues for Eulerian digraphs and embedded graphs, where determinants of certain matrices count Eulerian tours and quasi-trees, respectively. We will explore the interplay between these two settings and see how the corresponding matrices lead to Jacobian groups that naturally act on Eulerian tours and quasi-trees.
相關檔案：Talk_1151013.pdf

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