Elements of analytical geometry and the differential and integral calculus (1856)
Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Cincinnati : J. Ernst · leaf 88
tance be-tween the foci. 2. The line joining the foci, and produced, if necessary, iscalled the axis of the hyperbola. 3. The middle point of the straight line which joins the foci,is called the center of the hyperbola. 4. The eccentricity, is the distance from the center to eitherfocus, divided by…
Geometry, Analytic · Calculus
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