matrix A
A hyperplane arrangement is defined by a list of affine-linear equations. This methods creates a matrix, over the underlying ring of the hyperplane arrangement, whose entries are the defining equations.
A few reflection arrangements yield the following matrices.
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The trivial arrangement has no equations.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/HyperplaneArrangements.m2:1473:0.