(3 \times 3) skew symmetric matrix

Split a degenerate conic into two lines.

1 |

`C` |
a |

A *(3 \times 2)* matrix whose columns correspond to the homongeneous representation of two lines (real or complex).

Richter-Gebert, Jürgen (2011). *Perspectives on Projective Geometry - A Guided Tour Through Real and Complex Geometry*, Springer, Berlin, ISBN: 978-3-642-17285-4

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