例句與造句

1. An anonymous " Geometrical System of Conic Sections ", Cambridge, 1822, was ascribed to Marrat in the catalogue of the Liverpool Free Library.
2. Four points do not determine a conic, but rather a pencil, the 1-dimensional linear system of conics which all pass through the four points ( formally, have the four points as base locus ).
3. He wrote two textbooks on analytical geometry, " The Principles of Analytical Geometry " ( 1826 ) and " An Analytical System of Conic Sections " ( 1828; 5th edn, 1843 ).
4. The conclusion is that the three-parameter family of circles can be treated as a special case of the linear system of conics passing through two given distinct points " P " and " Q ".
5. For example, the pencil of curves ( 1-dimensional linear system of conics ) defined by x ^ 2 + ay ^ 2 = 1 is non-degenerate for a \ neq 0 but is degenerate for a = 0; concretely, it is an ellipse for a > 0, two parallel lines for a = 0, and a hyperbola with a  throughout, one axis has length 2 and the other has length 1 / \ sqrt { | a | }, which is infinity for a = 0.
6. It's difficult to find system of conics in a sentence. 用system of conics造句挺難的