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• 7 Is $PGL_n(\mathbb{Q})=PGL_n(\mathbb{Z})$?
• 6 Tate's proof that the character group of a local field is isomorphic to its additive group
• 6 Why are roots in representation theory called roots?
• 6 Good problem book on Abstract Algebra
• 6 Is there a list of the inner forms of the quasisplit groups over local and global fields of characteristic 0?
• 6 What is the spectral decomposition of $L^2(\textbf{G}(\mathbb{Q})\backslash \textbf{G}(\mathbb{A}))$ for compact quotient?
• 5 Why is the residue field of a $k$-scheme an extension of $k$?
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