Algorithm List

To meet the requirements of various scenarios, GES provides extensive basic graph algorithms, graph analytics algorithms, and graph metrics algorithms. The following table lists the algorithms:

**Table 1** Algorithm List
Algorithm	Description
PageRank	PageRank, also known as web page ranking, is a hyperlink analysis algorithm used to rank web pages (nodes) based on their search engine results. PageRank is a way of measuring the relevance and importance of web pages (nodes).
PersonalRank	PersonalRank is also called Personalized PageRank. It inherits the idea of the classic PageRank algorithm and uses the graph link structure to recursively calculate the importance of each node. However, unlike the PageRank algorithm, to ensure that the access probability of each node in the random walk can reflect user preferences, the PersonalRank algorithm returns each hop to the source node at a (1-alpha) probability during random walk. Therefore, the relevance and importance of network nodes can be calculated based on the source node (the higher the PersonalRank value, the higher the correlation/importance of the source node).
K-core	K-core is a classic graph algorithm used to calculate the number of cores of each node. The calculation result is one of the most commonly used reference values for determining the importance of a node so that the propagation capability of the node can be better understood.
K-hop	K-hop is an algorithm used to search all nodes in the k layer that are associated with the source node through breadth-first search (BFS). The found sub-graph is the source node's ego-net. The K-hop algorithm returns the number of nodes in the ego-net.
Shortest Path	The Shortest Path algorithm is used to find the shortest path between two nodes in a graph.
All Shortest Paths	The All Shortest Paths algorithm is used to find all shortest paths between two nodes in a graph.
SSSP	The SSSP algorithm finds the shortest paths from a specified node (source node) to all other nodes.
Shortest Path of Vertex Sets	The Shortest Path of Vertex Sets algorithm finds the shortest path between two vertex sets. It can be used to analyze the relationships between blocks in scenarios such as Internet social networking, financial risk control, road network transportation, and logistics delivery.
n-Paths	The n-Paths algorithm is used to find the n paths between two vertices on the k layer of a graph. It applies to scenarios such as relationship analysis, path design, and network planning.
Closeness Centrality	Closeness centrality is the average distance from a node to all other reachable nodes. It can be used to measure the time for transmitting information from this node to other nodes. A small Closeness Centrality within a node corresponds to a central location of the node.
Label Propagation	The Label Propagation algorithm is a graph-based semi-supervised learning method. Its basic principle is to predict the label information about unlabeled nodes using that of the labeled nodes. This algorithm can create graphs based on the relationships between samples. Nodes include labeled data and unlabeled data, and the edge indicates the similarity between two nodes. Node labels are transferred to other nodes based on the similarity. Labeled data is like a source used to label unlabeled data. Greater node similarity corresponds to an easier label propagation.
Louvain	Louvain is a modularity-based community detection algorithm with high efficiency and effect. It detects hierarchical community structures and aims to maximize the modularity of the entire community network.
Link Prediction	The Link Prediction algorithm is used to calculate the similarity between two nodes and predict their relationship based on the Jaccard measurement method.
Node2vec	By invoking the Word2vec algorithm, the Node2vec algorithm maps nodes in the network to the Euclidean space, and uses vectors to represent the node characteristics. The Node2vec algorithm generates random steps from each node using the rollback parameter P and forward parameter Q. It combines BFS and DFS. The rollback probability is proportional to 1/P, and the forward probability is proportional to 1/Q. Multiple random steps are generated to reflect the network structures.
Real-time Recommendation	The Real-time Recommendation algorithm is based on the random walk model and is used to recommend nodes that are similar (have similar relationships or preferences) to the input node. This algorithm can be used to recommend similar products based on historical browsing data or recommend potential friends with similar preferences.
Common Neighbors	Common Neighbors is a basic graph analysis algorithm that obtains the neighboring nodes shared by two nodes and further speculate the potential relationship and similarity between the two nodes. For example, it can intuitively discover shared friends in social occasions or commodities that interest both nodes in the consumption field.
Connected Component	A connected component stands for a sub-graph, in which all nodes are connected with each other. Path directions are involved in the strongly connected components and are not considered in the weakly connected components. NOTE: This algorithm generates weakly connected components.
Degree Correlation	The Degree Correlation algorithm calculates the Pearson correlation coefficient between the source vertex degree and the target vertex degree of each edge. It is used to indicate whether the high-degree nodes are connected to other high-degree nodes in a graph.
Triangle Count	The Triangle Count algorithm counts the number of triangles in a graph without considering the edge directions. More triangles mean higher node association degrees and closer organization relationships.
Clustering Coefficient	The clustering coefficient is a measure of the degree to which nodes in a graph tend to cluster together. Evidence suggests that in most real-world networks, and in particular social networks, nodes tend to create tightly knit groups characterized by a relatively high density of ties.
Betweenness Centrality	Betweenness centrality is a measure of centrality in a graph based on shortest paths. The Betweenness Centrality algorithm calculates shortest paths that pass through a vertex.
Edge Betweenness Centrality	The Edge Betweenness Centrality algorithm calculates shortest paths that pass through an edge.
Origin-Destination Betweenness Centrality	The Origin-Destination Betweenness Centrality algorithm calculates shortest paths that pass through a (an) vertex/edge, with the origin and destination specified.
Circle Detection with a Single Vertex	This algorithm solves a classic graph problem: detecting loops in a graph. Vertices on looped paths reflect the importance of the vertices. This algorithm is suitable for transportation analysis and financial risk control.
Common Neighbors of Vertex Sets	This algorithm obtains vertex set neighbors, that are, the intersection of two vertex sets (groups). They are objects that are associated with both sets, for example, common friends, common products of interest, and persons contacting with both communities. You can use neighbors to further speculate potential relationships and the degree of the connection between two vertices.
All Shortest Paths of Vertex Sets	This algorithm is used to discover all shortest paths between two vertex sets. It can be used to analyze the relationships between blocks in scenarios such as social networking, financial risk control, road networks and transportation, and logistics delivery.
Subgraph Matching	This algorithm is used to find all subgraphs of a given small graph that is isomorphic to a given large graph. This is a basic graph query operation and is intended to explore important substructures of a graph.
Filtered All Pairs Shortest Paths	This algorithm is used to search for the shortest path between any two vertices in the graph that meets the condition. In a specific application scenario, you need to set a start vertex set (sources) and end vertex set (targets) as input for this algorithm. This algorithm returns the required shortest paths between the start and the end vertex sets.
Filtered All Shortest Paths	This algorithm allows you to search query results of the Shortest Path algorithm for the paths that meet the conditions between two vertices in a graph.
TopicRank	The TopicRank algorithm is one of commonly used algorithms for ranking topics by multiple dimensions. For example, this algorithm is applicable to rank complaint topics obtained through a government hotline.
Filtered n-Paths (2.2.22)	The filtered n-Paths algorithm is used to find no more than n k-hop loop-free paths between the source and target vertices. The start vertex (source), end vertex (target), number of hops (k), number of paths (n), and filter criteria (filters) are the parameters for the algorithm.