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119 bytes added ,  23:26, July 14, 2008
as a quotient topology
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The shape was independently discovered by [[German]] [[mathematicians]] [[August Ferdinand Möbius]] and [[Johann Benedict Listing]].
 
The shape was independently discovered by [[German]] [[mathematicians]] [[August Ferdinand Möbius]] and [[Johann Benedict Listing]].
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[[Topology|Topologically]], it is one of the two possible [[quotient]]s of a [[rectangle]]; the other is a [[torus]].
    
[[category:geometry]]
 
[[category:geometry]]
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