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bitruncation
In geometry, a bitruncation is an operation on regular polytopes. It represents a truncation beyond rectification. The original edges are lost completely and the original faces remain as smaller copies of themselves.
Bitruncated regular polytopes can be represented by an extended Schläfli symbol notation t1,2 or 2t.
== In regular polyhedra and tilings ==
For regular polyhedra, a ''bitruncated'' form is the truncated dual. For example, a bitruncated cube is a truncated octahedron.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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