An Elementary Course in Synthetic Projective Geometry
The book An Elementary Course in Synthetic Projective Geometry was written by author Lehmer, Derrick Norman, 1868-1938 Here you can read free online of An Elementary Course in Synthetic Projective Geometry book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is An Elementary Course in Synthetic Projective Geometry a good or bad book?
What reading level is An Elementary Course in Synthetic Projective Geometry book?
To quickly assess the difficulty of the text, read a short excerpt:
Consider more generally the case of two pencils perspective to each other with axis of perspectivity u' (Fig. 9). Cut across them by a line u. We get thus two projective point-rows, superposed on the same line u, and a moment's reflection serves to show that the point N of intersection u and u' corresponds to itself in the two point-rows. Also, the point if, where u 29 30 PEOJECTIVE GEOMETRY Fig. 9 intersects the line joining the centers of the two pen- cils, is seen to correspond to itself. It... is thus possible for two projective point- rows, superposed upon the same line, to have two self -corresponding points. Clearly M and iV may fall together if the line joining the centers of the pencils happens to pass through the point of in- tersection of the lines u and u'. 48. We may also give an illustration of a case where two superposed projective point-rows have no self-corresponding points at all. Thus we may take two lines revolving about a fixed point S and always making the same angle a with each other (Fig.
User Reviews: