Projective Geometry

by Norman.Galois
Tags: geometry, projective
Norman.Galois is offline
Jan28-10, 06:04 PM
P: 43
I'm doing reading course on Projective Geometry.

I was presented this question (in the textbook, not homework):

In [itex]P_2 R[/itex], let A, B, and C be points on a line L and let A', B', and C' be points on a line L'. Prove there exists points [itex]S_1[/itex], [itex]S_2[/itex] and [itex]S_3[/itex], and lines [itex]l_1[/itex] and [itex]l_2[/itex] such that projection from L to [itex]l_1[/itex] with center [itex]S_1[/itex], ...

And it continues. The remainder is not important. What do they mean by center [itex]S_1[/itex]?

Thank you.
Phys.Org News Partner Mathematics news on
Researchers help Boston Marathon organizers plan for 2014 race
'Math detective' analyzes odds for suspicious lottery wins
Pseudo-mathematics and financial charlatanism
radou is offline
Jan29-10, 03:18 AM
HW Helper
radou's Avatar
P: 3,225
Isn't it a fixed point in some projection?
Norman.Galois is offline
Jan29-10, 08:08 AM
P: 43
Quote Quote by radou View Post
Isn't it a fixed point in some projection?
That seems to make more sense. I'll try that out. Thanks!

Register to reply

Related Discussions
Projective Geometry question. Differential Geometry 1
Projective Space Differential Geometry 1
projective modules Linear & Abstract Algebra 3
projective geometry General Math 6