👉 In mathematics, an incidence matrix is a square matrix that encodes the number of incidences between each pair of points in a geometric object. These matrices are crucial for understanding the topology of the geometry and can be used to classify objects based on their properties.
A simple example of an incidence matrix would look like this:
```
1 0 0
0 1 0
0 0 1
```
In this case, points 1, 2, and 3
incuse