Module $M_{ 23 }$

$\mathbb R/\mathbb Z$: the circle group over $\mathbb Z$: the ring of integers

Description:

The abelian group $\mathbb R/\mathbb Z$. It has several other identities: the subgroup of $\mathbb C^\times$ of elements modulus $1$; or $U(1)$; or $SO(2)$; or $\mathbb R\oplus \mathbb Q/\mathbb Z$.

Reference(s):

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