Linked from

The 10 pages that link to Projective duality, each with the reason it gives.

• Homogeneous coordinatesRelated: Homogeneous point triples and line coefficients share the same algebraic form.

• Ceva's theoremRelated: It connects concurrency statements such as Ceva's theorem to dual collinearity theorems.

• Projective spaceRelated: The vector-space definition makes points and hyperplanes dual subspace concepts.

• Pascal's theoremRelated: Duality transforms Pascal's collinearity result into Brianchon's concurrency result.

• Complete quadrilateralRelated: Duality exchanges the four defining lines with four points and preserves the configuration’s structure.

• Brianchon's theoremRelated: It turns Pascal's collinearity for an inscribed hexagon into Brianchon's concurrence for a circumscribed one.

• Sylvester–Gallai theoremRelated: It translates the point-set statement into a claim about ordinary intersections of line arrangements.

• Desargues's theoremRelated: It turns the theorem's point-concurrency and line-collinearity claims into dual statements.

• Thomsen's theoremRelated: Dual formulations explain why versions of the theorem use quadrangles or quadrilaterals.