Top network posts

• 21 Under what conditions $\|x-y\|=n\iff\|f(x)-f(y)\|=n.$ for $n\in\mathbf{N}$ implies isometry?
• 11 What is the best reference for Spectral theory?
• 9 The Weak topology on an infinite-dimensional space is not metrizable
• 8 In a uniformly convex Banach space $x_n\stackrel{w}\to x$ and $||x_n||\to ||x||$ implies $||x_n-x||\to 0$
• 8 How to compute the residue of $(z^2+2z+1)\sin\left(\frac{1}{1+z}\right)$
• 8 What are the differences between these kinds of articles: original, review, letter, and short communication?
• 6 Exercise books in functional analysis
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