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analysis - In $C([0,1],\mathbb{R})$, the sup norm and the $L^1$ norm are not equivalent. - Mathematics Stack Exchange
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Homeomorphism of a Disk Mapping the Origin to Another Interior Point - Wolfram Demonstrations Project
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real analysis - Sketch the open ball at the origin $(0,0)$, and radius $1$. - Mathematics Stack Exchange
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general topology - open ball on metric $d''(z,z') = \max \{d_i(x_i,x_i'), i\in \{1,\cdots,n\}\}$ in $\mathbb{R}^2$ - Mathematics Stack Exchange
Let's say that [math] \tau [/math] is a topology of X. Then, are all elements of [math] \tau [/math] open sets of X? - Quora
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proof that metrics generate the same topology, if their balls can be contained in one another. - Mathematics Stack Exchange
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