Talk:Real projective line

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Mathematics rating:
B Class
High Importance
 Field: Geometry

The main image with the circle[edit]

The main image looks something like a circle with one point representing both negative and positive infinity. I find this image confusing. I picture the real projective line as a real line with two added points, Inf and -Inf. An even better picture in my mind I get is just the real number line and two added dots. Is this image misleading or not? I don't have any reference texts beside me to cite at the moment, sorry. (talk) 00:19, 26 January 2016 (UTC)

There is only one point at infinity on the projective line. You're perhaps thinking of the extended real line. Sławomir
01:07, 26 January 2016 (UTC)
Ah, alright. thanks. I got them confused for a second. Why is there a circle. Sorry, still haven't gotten any reference texts. I'm too lazy to walk upstairs and check out the needed books, lmao. (talk) 02:20, 26 January 2016 (UTC)