New posts in Projective Geometry

projection of a quadric surface

Two Quadrilaterals Intersection Area (Special Case)

Example for projective geometry used in quantum mechanics

Can a continuous map $S^2 \rightarrow S^2$ preserve orthogonality without being an isometry?

Plücker Relations

Is there a slick way to show that finite projective planes of $7$ points are unique up to isomorphism?

Surface of type $(2,2)$ on the Segre cubic scroll $\mathbb{P}^1 \times \mathbb{P}^2 \subset \mathbb{P}^5$

A geometric definition of the addition law on abelian surfaces

Presentations of $\mathbf{PGL}_3(\mathbb{F}_2)$ by three involutions

Finding ellipse-ellipse intersections in $\mathbb R^2$