A function or mapping (Defined as f:X→Y) is a relationship from elements of one set X to elements of another set Y (X and Y are non-empty sets). X is called Domain and Y is called Codomain of function ‘f’. Function ‘f’ is a relation on X and Y such that for each x∈X, there exists a unique y∈Y such that (x,y)∈R.

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## What is relation and function in discrete mathematics?

A function or mapping (Defined as f:X→Y) is a relationship from elements of one set X to elements of another set Y (X and Y are non-empty sets). X is called Domain and Y is called Codomain of function ‘f’. Function ‘f’ is a relation on X and Y such that for each x∈X, there exists a unique y∈Y such that (x,y)∈R.

**What is circular relation in discrete mathematics?**

Circular Relation: A relation R is called circular if (a, b) ∈ R and (b, c) ∈ R ⇒(c, a) ∈ R. Necessary Part: Let the relation R be reflexive and circular. Then we shall prove that R is reflexive, symmetric and transitive. (a, b) ∈ R, (b, c) ∈ R ⇒ (c, a) ∈ R, since R is circular and (a, a) ∈ R, since R is reflexive.

**How many types of relations are there in discrete mathematics?**

A1. There are 9 types of relations in maths namely: empty relation, full relation, reflexive relation, irreflexive relation, symmetric relation, anti-symmetric relation, transitive relation, equivalence relation, and asymmetric relation.

### What is function in discrete math?

A function is a rule that assigns each input exactly one output. We call the output the image of the input. The set of all inputs for a function is called the domain . The set of all allowable outputs is called the codomain .

**WHAT IS function and relation in general mathematics?**

A relation is a set of inputs and outputs, and a function is a relation with one output for each input.

**What is n ary relation in discrete mathematics?**

Definition (n-ary relation): An n-ary relation on sets A1., An is a set of ordered n-tuples where ai is an element of Ai for all i, 1 i n . Thus an n-ary relation on sets A1., An is a subset of Cartesian product A1 An .

#### What are the different types of functions in discrete mathematics?

Types of functions:

- One to one function(Injective): A function is called one to one if for all elements a and b in A, if f(a) = f(b),then it must be the case that a = b.
- Onto Function (surjective): If every element b in B has a corresponding element a in A such that f(a) = b.

**Which types of relations are functions?**

A function is a relation which describes that there should be only one output for each input (or) we can say that a special kind of relation (a set of ordered pairs), which follows a rule i.e., every X-value should be associated with only one y-value is called a function.

**What are the applications of discrete mathematics?**

Discrete Mathematics Applications. The research of mathematical proof is especially important in logic and has applications to automated theorem demonstrating and regular verification of software. Partially ordered sets and sets with other relations have uses in different areas. Number theory has applications to cryptography and cryptanalysis.

## What is the best book for discrete mathematics?

http://math.stackexchange.com/questions/1533/what-is-the-best-book-for-studying-discrete-mathematics. in that the top voted recomm is Concrete Mathematics by Knuth et al. many many other previous recomms for this since its fortunately a FAQ

**What is discrete math problem?**

Discrete Mathematics is about mathematical structures. It is about things that can have distinct discrete values. Discrete mathematical structures are also known as Decision Mathematics or Finite Mathematics. This is very popularly used in computer science for developing programming languages, software development, cryptography, algorithms etc.

**What is a discrete relation?**

What is discrete relationship? A discrete function is a function with distinct and separate values. This means that the values of the functions are not connected with each other. For example, a discrete function can equal 1 or 2 but not 1.5. Now, let’s look at these two types of functions in detail.