Combinatorial Geometry
組み合わせ幾何についてのこちらの文書によれば
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- Incidence Structure
- An incidence structure is a triple so that are disjoint sets and is a relation on .
- We call elements of points, elements of blocks or lines and we associate each line with the set of points incident with it.
- So, if and satisfy p ∼ b we say that p is contained in b and write and if we let
- Incidence Structure