 ... normal to the tangent plane at the bearing. (This condition implies that, of the normals to the tangent planes at the bearings, no two coincide ; no three are in one plane, and either meet in a point or are parallel ; no four are in one plane, or...  Mathematical Questions and Solutions - Page 1011869Full view - About this book
 | 1868 - 380 pages
...with regard to a system of quadrics, the locus of centre is a right line. Solution by the PEOPOSEB. For the lines joining the vertices of a tetrahedron...parallel to the intersection of the other two planes, the hypurboloid of which these are generators passes through the intersection of the three planes, and... | |
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