Top network posts

• 12 Finding the norm of the shift operator on $l^\infty$, $(x_1,x_2, \dots)\mapsto (x_2,x_3,\dots)$
• 11 Show that the collection of matrices which commute with every idempotent matrix are the scalar matrices
• 9 Is every finite subgroup of $C^*=$ set of all non-zero complex numbers cyclic?
• 8 Is there a onto group homomorphism from $\Bbb Q$ to $\Bbb Z$?
• 6 Let $f$ be a continuous and open map from $\mathbb R $ to $\mathbb R$.Prove that $f$ is monotonic.
• 6 Which of the following sets are compact:
• 6 Can $G$ have a Sylow -5 subgroups and Sylow -3 subgroups [CSIR-NET-DEC-2015]
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