Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 278
ade by the plane y = h is real when ft < J^ t/—, and imaginary when ^ > J^ V/^~ • The section made by the plane 2: = c is real when c < -t y -j;-, and imaginary when c > i W —- . Thus we see that the surface is enclosed within a rectangu-lar parallelepiped whose dimensions are When a B… … 264 SOLID ANALYTIC GEOMETRY. These are called the principal sections of the surface. Theprincipal sections are larger ellipses than the sections parallelto them, as is indicated by the magnitude of the absoluteterm. The surface is called the Ellipsoid. It may be generated by the motion of an…
Geometry, Analytic
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