View source for File:Stereographic projection onto the z=0 plane.svg

Nonfiction: The [[Circle (nonfiction)|circle]] is birationally equivalent to the line. One birational map between them is a [[Stereographic projection (nonfiction)|stereographic projection]] onto the z=0 plane, pictured here.

== In the News ==

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== Fiction cross-reference ==

* [[Crimes against mathematical constants]]
* [[Gnomon algorithm]]
* [[Gnomon Chronicles]]
* [[Mathematician]]
* [[Mathematics]]

== Nonfiction cross-reference ==

* [[Algebraic geometry (nonfiction)]]
* [[Birational geometry (nonfiction)]]
* [[Mathematics (nonfiction)]]
* [[Stereographic projection (nonfiction)]]

External links:

* [https://en.wikipedia.org/wiki/Number_theory Number theory] @ Wikipedia

Attribution:

* By Joshuardavis - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2012657

[[Category:Nonfiction (nonfiction)]]
[[Category:Mathematics (nonfiction)]]
[[Category:Algebraic geometry (nonfiction)]]