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Glossary

Hyperplane Arrangement

A hyperplane arrangement (or affine hyperplane arrangement) is a finite set of hyperplanes in Euclidean $$d-space, where a hyperplane is an affine subspace of dimension $$d - 1.

A finite set of hyperplanes in projective space is called a projective hyperplane arrangment (or in some references also just a hyperplane arrangement).

The "isomorphism types" of (affine) hyperplane arrangements are called dissection types.