# What is Facebook social graph?

## What is Facebook social graph?

As of 2010, Facebook's social graph is the largest social network dataset in the world, and it contains the largest number of defined relationships between the largest number of people among all websites because it is the most widely used social networking service in the world.

## Why is social graphing important?

The social graph is about understanding those followers, fans and connections in a deeper way, in order to engage with an ever increasing number of people. The idea of the social graph is to look at who is following and connected to those individuals following you.

## What is social network graph?

A social network graph is a graph where the nodes represent people and the lines between nodes, called edges, represent social connections between them, such as friendship or working together on a project. These graphs can be either undirected or directed.

## What are the applications of graph?

Applications of Graph Theory

• Graphs are used to define the flow of computation.
• Graphs are used to represent networks of communication.
• Graphs are used to represent data organization.
• Graph transformation systems work on rule-based in-memory manipulation of graphs.

## What are the types of graph?

Types of Graphs and Charts

• Bar Chart/Graph.
• Pie Chart.
• Line Graph or Chart.
• Histogram Chart.
• Area Chart.
• Dot Graph or Plot.
• Scatter Plot.
• Bubble Chart.

## How is graph theory used today?

Graph theoretical concepts are widely used to study and model various applications, in different areas. They include, study of molecules, construction of bonds in chemistry and the study of atoms. Similarly, graph theory is used in sociology for example to measure actors prestige or to explore diffusion mechanisms.

## Where do we use graphs in real life?

5 Practical Applications of Graph Data Structures in Real Life

• Social Graphs.
• Knowledge Graphs.
• Recommendation Engines.
• Path Optimization Algorithms.
• Scientific Computations.

## What is graph and its application?

A graph is a non-linear data structure, which consists of vertices(or nodes) connected by edges(or arcs) where edges may be directed or undirected. In Computer science graphs are used to represent the flow of computation.

## What is the purpose of using charts and graphs?

Graphs and charts are visuals that show relationships between data and are intended to display the data in a way that is easy to understand and remember. People often use graphs and charts to demonstrate trends, patterns and relationships between sets of data.

18th century

William Playfair

Ancient Greeks

## What is a K4 graph?

K4 is a maximal planar graph which can be seen easily. In fact, a planar graph G is a maximal planar graph if and only if each face is of length three in any planar embedding of G. Corollary 1.

## Is K4 a eulerian?

Note that K4,4 is the only one of the above with an Euler circuit.

## How do you know if a graph is complete?

In the graph, a vertex should have edges with all other vertices, then it called a complete graph. In other words, if a vertex is connected to all other vertices in a graph, then it is called a complete graph.

## What is a K3 graph?

In the mathematical field of graph theory, a complete bipartite graph or biclique is a special kind of bipartite graph where every vertex of the first set is connected to every vertex of the second set. ... Llull himself had made similar drawings of complete graphs three centuries earlier.

## How do you know if a graph is planar?

A graph is said to be planar if it can be drawn in a plane so that no edge cross. Example: The graph shown in fig is planar graph. Region of a Graph: Consider a planar graph G=(V,E). A region is defined to be an area of the plane that is bounded by edges and cannot be further subdivided.

## How do you know if a graph is bipartite?

The graph is a bipartite graph if:

1. The vertex set of can be partitioned into two disjoint and independent sets and.
2. All the edges from the edge set have one endpoint vertex from the set and another endpoint vertex from the set.

## Is K3 bipartite?

Then there is a plane embedding of K3,3 satisfying v − e + f = 2, Euler's formula. Note that here, v = 6 and e = 9. Moreover, since K3,3 is bipartite, it contains no 3-cycles (since it contains no odd cycles at all). So each face of the embedding must be bounded by at least 4 edges from K3,3.

## Why is K5 not planar?

We now use the above criteria to find some non-planar graphs. K5: K5 has 5 vertices and 10 edges, and thus by Lemma 2 it is not planar. K3,3: K3,3 has 6 vertices and 9 edges, and so we cannot apply Lemma 2. ... In fact, any graph which contains a “topological embedding” of a nonplanar graph is non- planar.

36 edges

5

## How many edges are there in a graph with 10 vertices each of degree six?

Example: How many edges are there in a graph with 10 vertices, each having degree six? Solution: the sum of the degrees of the vertices is 610 = 60. The handshaking theorem says 2m = 60. So the number of edges is m = 30.

## How many edges will be there in a 3 regular graph of 6 vertices?

For 3 vertices the maximum number of edges is 3; for 4 it is 6; for 5 it is 10 and for 6 it is 15. For n,N=n(n−1)/2. There are two ways at least to prove this.

## How many vertices does a regular graph have?

The smallest graphs that are regular but not strongly regular are the cycle graph and the circulant graph on 6 vertices. ‑regular graph on 2 k + 1 vertices has a Hamiltonian cycle.

## Is every regular graph is complete graph?

Ans: A graph is said to be regular if all the vertices are of same degree. Yes a complete graph is always a regular graph.

## Is null graph a regular graph?

Definition: A graph is a Null Graph if there are no edges in the graph, that is \$\mid \: E(G) \: \mid = 0\$. We should note that null graphs always have degree since there are no edges joining the vertices. Null graphs also have edges clearly. We can say that null graphs are also 0-regular.

## What is a 2 regular graph?

A two-regular graph is a regular graph for which all local degrees are 2. A two-regular graph consists of one or more (disconnected) cycles. The numbers of two-regular graphs on , 2, ... nodes are 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, ... ( OEIS A008483), which are equivalent to the numbers of partitions of into parts.

## What makes a graph regular?

A graph is called regular graph if degree of each vertex is equal. A graph is called K regular if degree of each vertex in the graph is K.

## What makes a graph eulerian?

Definition: A graph is considered Eulerian if the graph is both connected and has a closed trail (a walk with no repeated edges) containing all edges of the graph. Definition: An Eulerian Trail is a closed walk with no repeated edges but contains all edges of a graph and return to the start vertex.