Top network posts

• 41 How to show that quotient space $X/Y$ is complete when $X$ is Banach space, and $Y$ is a closed subspace of $X$?
• 26 How to show that topological groups are automatically Hausdorff?
• 23 Did ancient Chinese frontline troops decapitate themselves to scare their foes?
• 22 Is kidney theft happening in real life?
• 14 Why the nontrivial nullspace of a functional has codimension 1?
• 11 Is the cardinality of uncountable $G_{\delta}$ set of $\mathbb{R}$ equals the cardinality of the continuum?
• 11 Why continuum function isn't strictly increasing?
• View more network posts →