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EntityQ2912125· pop 6· linked from 18 articles

thumb|The torus can be made an abelian group isomorphic to the product of the [[circle group. This abelian group is a Klein four-group-module, where the group acts by reflection in each of the coordinate directions (here depicted by red and blue arrows intersecting at the identity element).]]

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Subclass of
module
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underlying structure
abelian group
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