An incidence structure consists of points, lines, and flags where a point is said to be incident with a line if . It is a (finite) partial geometry if there are integers such that:
- For any pair of distinct points and, there is at most one line incident with both of them.
- Each line is incident with points.
- Each point is incident with lines.
- If a point and a line are not incident, there are exactly pairs, such that is incident with and is incident with .
A partial geometry with these parameters is denoted by .
Read more about Partial Geometry: Properties, Special Case, See Also
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