The link should have worked. It works for me, anyway. Here's the address: https://en.wikipedia.org/wiki/Projective_geometry.neila9876 @ rabbit htam9876:

This semi-tramp come here to tell you a good news: that dragon said again in the Lounge that he likes bunny...

Rabbit htam9876 @ neila9876:

Be careful. It's fishy. I told you a bad news: that dragon posted a link here, but it doesn't work. He said "...there is a lot more going on than what X4 can handle."

I ask you a question: can affine geometry handle everything? such as QM?

neila9876 @ rabbit htam9876:

I can give you the best answer: I don't know.

Can affine geometry handle everything? Of course not. Much of what I've seen of Differential Geometry (the Mathematics of both SR and GR) often deals with many different geometries. If you take a look at the (admittedly horrible) Mathematical stucture of these theories, especially applied to QM, you can easily see that affine geometry is not always used.

I suppose I need to ask you a question (which will determine any comments on my part in dealing with this): Do

*you*know what affine geometry is? I posted the link about projective geometry but I never asked you how much you know about the affine stuff.

-Dan