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  • ...dered pairs]], {{M|(f,U)}}, where {{M|U}} is an [[open neighbourhood]]<ref group="Unsure">Page 12, first paragraph - he says neighbourhood, is that my neigh * {{M|g:(0,1)\rightarrow\mathbb{R} }}<ref group="Note">{{M|(-1,1):\eq\{x\in\mathbb{R}\ \vert\ -1 < x < 1\} }} - an [[open i
    5 KB (910 words) - 14:07, 1 December 2016