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In graph theory, the degree (or valency) of a vertex of a graph is the number of edges that are incident to the vertex, and in a multigraph, loops are counted twice. The degree of a vertex <math>v</math> is denoted <math>\deg(v)</math> or <math>\deg v</math>. The maximum degree of a graph <math>G</math>, denoted by <math>\Delta(G)</math>, and the minimum degree of a graph, denoted by <math>\delta(G)</math>, are the maximum and minimum degree of its vertices. In the multigraph on the right, the maximum degree is 5 and the minimum degree is 0.

In graph theory, the degree (or valency) of a vertex of a graph is the number of edges that are incident to the vertex, and in a multigraph, loops are counted twice. The degree of a vertex <math>v</math> is denoted <math>\deg(v)</math> or <math>\deg v</math>. The maximum degree of a graph <math>G</math>, denoted by <math>\Delta(G)</math>, and the minimum degree of a graph, denoted by <math>\delta(G)</math>, are the maximum and minimum degree of its vertices. In the multigraph on the right, the maximum degree is 5 and the minimum degree is 0.

在'''<font color="#ff8000">图论 Graph Theory</font>'''中，图中顶点的'''<font color="#ff8000">度 Degree</font>'''(或价)是入射到该顶点的边的数量。在'''<font color="#ff8000">多重图 Multigraph</font>'''中，'''<font color="#ff8000">自环 Loops</font>'''会被计算两次。顶点的度数可表示为<math>\deg(v)</math>或<math>\deg v</math>。一个图<math>G</math>的最大度值表示为<math>\Delta(G)</math>，最小度值表示为 <math>\delta(G)</math>。在右侧的多重图中，最大度值为5，最小度值为0。

在'''<font color="#ff8000">图论 Graph Theory</font>'''中，图中顶点的'''<font color="#ff8000">度 Degree</font>'''(或价)是入射到该顶点的边的数量。在'''<font color="#ff8000">多重图 Multigraph</font>'''中，'''<font color="#ff8000">自环 Loops</font>'''会被计算两次。顶点的度数可表示为<math>\deg(v)</math>或<math>\deg v</math>。一个图<math>G</math>的最大度值可表示为<math>\Delta(G)</math>，最小度值可表示为 <math>\delta(G)</math>。在右侧的多重图中，最大度值为5，最小度值为0。