射影直線 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "射影直線" in Japanese language version.

refsWebsite

Global rank Japanese rank

1mathoverflow.net

low place

low place

1books.google.com

3^rd place

61^st place

books.google.com

Harris, Joe (1992), Algebraic Geometry: A First Course, Graduate Texts in Mathematics, 133, Springer, ISBN 9780387977164 .

mathoverflow.net

Action of PGL(2) on Projective Space – see comment and cited paper.