例句與造句

1. The purely geometric approach of von Staudt was based on the complete quadrilateral to express the relation of projective harmonic conjugates.
2. The projective harmonic conjugate of such a " midpoint " with respect to the two endpoints is the point at infinity.
3. He also made discoveries about projective harmonic conjugates; relating these to the poles and polar lines associated with conic sections.
4. The second set of fixed points is This situation is what is classically called the " " ", and arises in projective harmonic conjugates.
5. For instance, the polar line can be viewed as the set of projective harmonic conjugates of a given point, the pole, with respect to a conic.
6. It's difficult to find projective harmonic conjugates in a sentence. 用projective harmonic conjugates造句挺難的
7. For instance, given a line containing the points and, the "'midpoint "'of line segment is defined as the point which is the projective harmonic conjugate of the point of intersection of and the absolute line, with respect to and.
8. Karl von Staudt reformed mathematical foundations in 1847 with the complete quadrangle when he noted that a " harmonic property " could be based on concomitants of the quadrangle : When each pair of opposite sides of the quadrangle intersect on a line, then the diagonals intersect the line at projective harmonic conjugate positions.
9. Two points A and B are said to be harmonic conjugates of each other with respect to another pair of points C, D if ( ABCD ) = & minus; 1, where ( ABCD ) is the cross-ratio of points A, B, C, D ( See Projective harmonic conjugates .)