Are there any nontrivial group extensions : $0 \rightarrow \mathbb{Z}^2 \rightarrow G \rightarrow Gl_2(\mathbb{Q}) \rightarrow 0 $ ? Any referall to literature is greatly welcomed. Thank you for all your answers.
2026-03-26 06:27:21.1774506441
Group extensions rational matrices by infinite cyclic squared
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