Difference between revisions of "Cross-surface"
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(Created page with "{{Glossary}} A '''cross-surface''' (or '''real projective plane''') is a possible finite Life universe in the form of a real projective plane. The si...") |
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==See also== | ==See also== | ||
*[[Topology]] | |||
*[[Finite plane]] | *[[Finite plane]] | ||
*[[Torus]] | *[[Torus]] | ||
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==External links== | ==External links== | ||
{{LinkWikipedia|Real_projective_plane|name=Real projective plane}} | {{LinkWikipedia|Real_projective_plane|name=Real projective plane}} | ||
*[http://golly.sourceforge.net/Help/bounded.html Golly Help: Bounded Grids] at the [[Golly]] website | |||
[[Category:Topologies]] | [[Category:Topologies]] | ||
Revision as of 03:34, 28 October 2018
A cross-surface (or real projective plane) is a possible finite Life universe in the form of a real projective plane. The simplest way to do this is to use an m × n rectangle with the top edge twisted and joined to the bottom edge and the left edge twisted and joined to the right edge. It is similar to the Klein bottle except it has both pairs of sides twisted instead of just one.
See also
External links
- Real projective plane at Wikipedia
- Golly Help: Bounded Grids at the Golly website