The relationship of the secund of parabolas of rays with two fixed rays and the system of rays in the plane
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Abstract
Systems of points and rays in the plane are, as is known, not related. However, related to a system of points are the secunds of conoprimas of points and rays having three fixed elements, and among those having two fixed elements, only the conoprimas of points (tetraprimas) are related. Now we will show that the secunds of parabolas of rays with two fixed rays are related to the system of rays in the plane.
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(Archived) Brief communications
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None
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