Add time:09/29/2019         Source:infona.pl

The E-transformation is quadratic in the projective 2-dimensional space and based on the circle n2 and the center W, which lies on the circle n2 . In the E-transformation to the straight line a’ corresponds a conic a2. The elation has been defined, where a’ is a vanishing line, the line ta parallel to a’ and passing through the point W is the axis of elation. All lines that do not pass through the center of the transformation W will correspond to osculary conics passing through the three points 1=2=3 coinciding with the center W. The centers of these conics make also a conic of centers s2. Special cases are distinguished dependent on whether the base quadrangle 1=2=3,4 is concave or convex. The case with point 4 lying at infinity has been discussed. Two theorems have been formulated and proved.

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