Category:Central Projections
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This category contains results about Central Projections.
Definitions specific to this category can be found in Definitions/Central Projections.
Let $\PP_1$ and $\PP_2$ be planes.
Let $C$ be a fixed point which lies on neither $\PP_1$ nor $\PP_2$.
Let $S$ be a set of points on $\PP_1$.
For each point $x \in S$, let a straight line be constructed through $C$ and $x$ to intersect $\PP_2$ at $y$.
The set of all $y$ is called the central projection of $S$ onto $\PP_2$.