# Graph Search

A graph search is a process of searching through a graph, which is a data structure consisting of nodes (vertices) and edges connecting them, for a particular value or condition. The most common type of graph search is a depth-first search, in which the graph is traversed depth-first, meaning that nodes are visited in the order in which they are encountered.

A breadth-first search is another type of graph search which visits nodes in the order in which they are encountered, but instead of going depth-first, it goes breadth-first, meaning that all nodes at a given depth are visited before any nodes at the next depth are visited.

There are other, more sophisticated, graph search algorithms, but these are the two most common. Does graph search still exist? Graph search was a feature of Facebook that allowed users to search for specific content within their network of friends. The feature was launched in March 2013, but was discontinued in April 2014.

##### What is graph search method?

The graph search method is a way of finding a path through a graph, by starting at one vertex and then considering all the neighbouring vertices, and then moving to the next vertex in the graph and considering all its neighbouring vertices, and so on.

One way of doing this is to use a breadth-first search, where you keep track of all the vertices you have visited so far, and all the vertices that are reachable from the vertices you have visited so far, and then you visit all the vertices in the order in which they are reachable.

Another way of doing this is to use a depth-first search, where you keep track of all the vertices you have visited so far, and all the vertices that are reachable from the vertices you have visited so far, and then you visit all the vertices in the order in which they are reachable, but you stop when you reach a vertex that has already been visited.

There are other ways of doing graph search, but these are the two most common.

##### Is graph search better than tree search?

There are a few key differences between graph search and tree search algorithms that can make one or the other more advantageous in different situations. For instance, graph search algorithms are more efficient at finding the shortest path between two nodes, while tree search algorithms can be better at finding the optimal path between two nodes.

Another key difference is that graph search algorithms can be parallelized more easily than tree search algorithms, making them more efficient on multicore processors.

In general, graph search algorithms tend to be more efficient than tree search algorithms, but there are some situations where tree search can be the better choice.

##### What is the best graph search algorithm?

There is no definitive answer to this question as it depends on the specific graph search problem you are trying to solve. However, some commonly used graph search algorithms include depth-first search (DFS), breadth-first search (BFS), and A*.

DFS is typically used when the goal is to find the shortest path between two nodes, while BFS is better suited for finding the shortest path between two nodes when there are many potential paths to choose from. A* is often used when the goal is to find the shortest path between two nodes while also taking into account other factors such as the cost of each node.

##### What is graph search algorithm in AI?

In computer science, graph search is a family of related algorithms. Graph search algorithms, unlike those for other data structures, take into account the structure of the graph when searching for a path or a solution.

There are three main types of graph search algorithms:

Uninformed search algorithms: These algorithms do not use any information about the goal or the problem, they simply explore the graph, expanding nodes until they find a goal node.

Informed search algorithms: These algorithms use information about the goal or the problem to guide the search.

Iterative deepening search: This is a combination of the two previous types of algorithms. It starts with an uninformed search and gradually adds more information about the goal as the search progresses.

There are many variations of these algorithms, and which one to use depends on the specific problem.