Inclusion map

An inclusion map is like a map that shows how one thing is inside of another thing. For example, if you have a big box and a smaller box inside of it, the inclusion map would show you that the small box is contained inside the big box.

In math, we use inclusion maps to show how some sets are inside of other sets. A set is like a group of things that are all related. The inclusion map shows how one set is completely contained within another set.

Think about a set of fruits. If you have a set of all the different kinds of fruits in the world, that set would be really big. But if you wanted to make a smaller set of just the fruits that grow on trees, you would use an inclusion map to show that the "tree fruits" set is inside the "all fruits" set.

The inclusion map looks like an arrow that goes from the smaller set to the bigger set. It's like a little sign that says "this set is part of that set". It helps us see how things are related and how they fit together.