Abstract: Line drawings of man-made scenes often exhibit instances of straight lines and conic sections, i.e. ellipses, parabolas, and hyperbolas. Constraints imposed on the scene by such instances ...

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THE merits of this book are so well known that comment is almost needless. Nearly thirty years have passed since it was first published, and since then a few additions have been made from time to ...

The Conic Sections By C. W. MacCord May 1891 Issue The Sciences 00 More by C. W. MacCord This article was originally published with the title ...

A plane spanned by vectors, and containing the point is described in parametric form by holds. This will be shown in the next Section. Condition (7) ensures that the matrix in (3) has diagonal form.