Practical solution to the problem of drawing a linear prima of conoprimas using two given ones

Abstract

It is precisely to this problem that Steiner devoted his famous treatise on linear primas of conoprimes (Kegelschnittbüschel), and it is precisely there that he presented it with such exhaustive completeness that absolutely nothing could be added to it, had he not from the outset, restricted his problem real conoprimas; among the given data there may also be imaginary conoprimas, even if in essence they are only ellipses, since imaginary hyperbolas are equivalent to real hyperbolas with the same asymptotes, the so-called conjugate ones.

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