# Codomain of relationship

### Codomain - Wikipedia

Absolutely it makes sense. The domain of the relation R is the set of arguments i.e. first members of each ordered pair and the codomain is the set of which the. If there is a set A and a set B and you have to find a relation from set A to set B, then #-> All the elements of set B is the CODOMAIN of that relation, regardless. Domain, Range, and Codomain of a Function. When working with quantitative relationships, three concepts help “set the stage” in your thinking.

## Domain, Range and Codomain

As for this particular example,these are just 2 different formulas of the same relation,the codomain and domain of the map doesn't change. So this is a real valued relation in the plane whose codomain is the positive reals. Rearranging a closed algebraic form for a relation-when this is possible-doesn't change either the domain or the range.

A relation is simply a set of ordered pairs. One of the hardest parts of making the transition from using math, like in calculus,to actually doing real mathematics, is to learn to completely divorce yourself from formulas and think in terms of abstract set-theoretic objects.

When you begin to do it,you'll realize this is necessary since formulas can give you the wrong intuition about such objects.

Here's a simple example for you to think about: Consider the vertical line test for a function in calculus. Why does this work? It's kind of mysterious when you're first told about it in calculus. But it becomes crystal clear when you learn the abstract definition of a function and consider the graph of a function to be simply a visualization in the plane of it.

Does Every Function Have a Domain? Yes, but in simpler mathematics we never notice this, because the domain is assumed: Usually it is assumed to be something like "all numbers that will work".

### Domain, Range, and Codomain of a Function – MathMaine

Or if we are studying whole numbers, the domain is assumed to be whole numbers. But in more advanced work we need to be more careful!

- Domain, Range, and Codomain of a Function

Codomain vs Range The Codomain and Range are both on the output side, but are subtly different. The Codomain is the set of values that could possibly come out.

The Codomain is actually part of the definition of the function. And The Range is the set of values that actually do come out.

But by thinking about it we can see that the range actual output values is just the even integers. So the codomain is integers we defined it that waybut the range is even integers.

The Range is a subset of the Codomain.

**Domain, Codomain, Objects and Images of Relations - Functions**

Well, sometimes we don't know the exact range because the function may be complicated or not fully knownbut we know the set it lies in such as integers or reals. So we define the codomain and continue on. The Importance of Codomain Let me ask you a question: Is square root a function? If we say the codomain the possible outputs is the set of real numbers, then square root is not a function! It can not give back 2 or more results for the same input.