# What is Kruskal algorithm?

## What is Kruskal algorithm?

Kruskal’s Algorithm is used to find the minimum spanning tree for a connected weighted graph. The main target of the algorithm is to find the subset of edges by using which, we can traverse every vertex of the graph.

## What is Kruskal’s minimum spanning tree algorithm?

Kruskal’s algorithm to find the minimum cost spanning tree uses the greedy approach. This algorithm treats the graph as a forest and every node it has as an individual tree. A tree connects to another only and only if, it has the least cost among all available options and does not violate MST properties.

## Who discovered Kruskal algorithm?

Joseph Kruskal

Joseph Kruskal
Born January 29, 1928 New York City, US
Died September 19, 2010 (aged 82)
Alma mater University of Chicago Princeton University
Known for Kruskal’s algorithm Kruskal’s tree theorem Kruskal–Katona theorem

## How is Kruskal algorithm implemented?

Kruskal’s algorithm for minimum spanning tree: Kruskal’s Algorithm is implemented to create an MST from an undirected, weighted, and connected graph. The edges are sorted in ascending order of weights and added one by one till all the vertices are included in it. No cycle is created in this algorithm.

## What does Kruskal’s algorithm return?

Kruskal’s algorithm finds a minimum spanning forest of an undirected edge-weighted graph. If the graph is connected, it finds a minimum spanning tree. It is a greedy algorithm in graph theory as in each step it adds the next lowest-weight edge that will not form a cycle to the minimum spanning forest.

## How is Kruskal’s algorithm implemented?

Kruskal’s Algorithm (Simple Implementation for Adjacency Matrix)

1. Sort all the edges in non-decreasing order of their weight.
2. Pick the smallest edge. Check if it forms a cycle with the spanning tree formed so far. If cycle is not formed, include this edge.
3. Repeat step#2 until there are (V-1) edges in the spanning tree.

## Is Kruskal better than prim?

The advantage of Prim’s algorithm is its complexity, which is better than Kruskal’s algorithm. Therefore, Prim’s algorithm is helpful when dealing with dense graphs that have lots of edges. However, Prim’s algorithm doesn’t allow us much control over the chosen edges when multiple edges with the same weight occur.

## Where is Kruskal algorithm used?

Explanation: The Kruskal’s algorithm is used to find the minimum spanning tree of the connected graph. It construct the MST by finding the edge having the least possible weight that connects two trees in the forest.

## Does Kruskal’s algorithm work?

Given a connected graph G = (V,E) with n vertices and m edges e1,e2,…,em, where c(ei) = “cost of edge ei”, we want to find a minimum cost spanning tree. It turns out (miraculously) that in this case, an obvious greedy algorithm (Kruskal’s algorithm) always works.

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