Grassmann algebra is an algebra for Geometry

## Constructing conics in space

This graphic shows the conic formed from two points, a line, and two planes according to an equation in
which P is the variable point describing the conic. Note that since a conic is of second degree, the variable
point P occurs twice in the product. The product itself involves both the exterior product operation for
building entities, and the regressive product operation for intersecting them.
Constructing conics in space

© John Browne 2012.

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