The restricted topological group direct product of the group with distinct invariant open subgroups .
Adèle Group
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References
Weil, A. Adèles and Algebraic Groups. Princeton, NJ: Princeton University Press, 1961.Referenced on Wolfram|Alpha
Adèle GroupCite this as:
Weisstein, Eric W. "Adèle Group." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/AdeleGroup.html