Coxeter–Dynkin diagram
Imagine you and your friends want to draw pictures of all the different shapes you know. Some shapes have straight lines, like squares and triangles, and some have curved lines, like circles and hearts. But you want to draw them all in a way that shows how they are related to each other.
So, you decide to use a special way of drawing called the coxeter-dynkin diagram. It helps you see how the shapes are related based on how many sides they have and how they are connected to each other.
On the diagram, each shape is represented by a dot. The dots are connected by lines that show how the shapes are connected to each other.
For example, if you draw a square and a triangle, you can represent them on the diagram as two dots connected by a line because they both have straight sides. If you draw a circle, it would be represented by a single dot because it doesn't have any sides.
When you draw more complex shapes, the diagram can get more complicated, but it always helps you see how the shapes are related to each other based on their sides and connections. It's like a puzzle that helps you understand geometry better!
So, you decide to use a special way of drawing called the coxeter-dynkin diagram. It helps you see how the shapes are related based on how many sides they have and how they are connected to each other.
On the diagram, each shape is represented by a dot. The dots are connected by lines that show how the shapes are connected to each other.
For example, if you draw a square and a triangle, you can represent them on the diagram as two dots connected by a line because they both have straight sides. If you draw a circle, it would be represented by a single dot because it doesn't have any sides.
When you draw more complex shapes, the diagram can get more complicated, but it always helps you see how the shapes are related to each other based on their sides and connections. It's like a puzzle that helps you understand geometry better!