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Let $D$ be a straight line.
Let $F$ be a point.
- $p = q$
Then $K$ is a parabola.
It appears in his Collection.
As he was scrupulous in documenting his sources, and he gives none for this construction, it can be supposed that it originated with him.
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): Entry: parabola