In a BracketRing, a Bracket represents a maximal minor of the matrix of coordinates of a configuration of points in a projective space. The example below illustrates this for a configuration of 5 points in the projective space $\mathbb{P}^2$.
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See also BracketRing and toBracketPolynomial.
The object Bracket is a type, with ancestor classes GCExpression < HashTable < Thing.
The source of this document is in Brackets.m2:518:0.