Assertion: ellipse's point | /r/HasProperty | line
Facets:
Source sentences:
text: the pole of q. An absolute point (line) of a polarity is one which is incident with its polar (pole).
text: Using Steiner's definition of a conic (this locus of points will now be referred to as a point conic) as the meet of corresponding rays of two related pencils, it is easy to dualize and obtain the corresponding envelope consisting of the joins of corresponding points of two related ranges (points on a line) on different bases (the lines the points are on).