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The Quốc âm thi tập (國音詩集 "National pronunciation poetry collection") [a] is a collection of Vietnamese poetry written in the vernacular chữ Nôm script attributed to Nguyễn Trãi (chữ Hán: 阮廌). The collection of 254 poems was traditionally written after Nguyễn Trãi's retirement from court life. [1]
A graph with 6 vertices and 7 edges where the vertex number 6 on the far-left is a leaf vertex or a pendant vertex. In discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges (unordered pairs of vertices), while a directed graph ...
A drawing of a graph with 6 vertices and 7 edges.. In mathematics and computer science, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.
In graph theory, a cut is a partition of the vertices of a graph into two disjoint subsets. [1] Any cut determines a cut-set, the set of edges that have one endpoint in each subset of the partition.
Every tree has queue number 1, with a vertex ordering given by a breadth-first traversal. [3] Pseudoforests and grid graphs also have queue number 1. [4] Outerplanar graphs have queue number at most 2; the 3-sun graph (a triangle with each of its edges replaced by a triangle) is an example of an outerplanar graph whose queue number is exactly 2. [5]
In graph theory, a tree is an undirected graph in which any two vertices are connected by exactly one path, or equivalently a connected acyclic undirected graph. [1] A forest is an undirected graph in which any two vertices are connected by at most one path, or equivalently an acyclic undirected graph, or equivalently a disjoint union of trees.
Shortest path (A, C, E, D, F), blue, between vertices A and F in the weighted directed graph. In graph theory, the shortest path problem is the problem of finding a path between two vertices (or nodes) in a graph such that the sum of the weights of its constituent edges is minimized.
During his career, Phan used several pen names, including Sào Nam (巢 南), Thị Hán (是 漢), Độc Tỉnh Tử (獨 醒 子), Việt Điểu, and Hàn Mãn Tử. Early years Phan was born as Phan Văn San ( 潘 文 珊 ) in the village of Sa Nam, Nam Đàn District of the northern central province of Nghệ An .