Definition talk:Partition of Unity (Topology)
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It's not too important whether the supports are open or closed. We want this condition so that the sum in the condition
- $(3): \quad \ds \forall x \in X: \sum_{\alpha \mathop \in A} \map {\phi_\alpha} x = 1$
is defined. Therefore we may as well either take the supports to be open, or if supports are to be closed (the main convention I have seen) take the interior of the supports in condition $(1)$.
This way will also be more in keeping with the convention regarding the definition of a partition of unity subordinate to an open cover of $X$. --Linus44 (talk) 19:10, 15 September 2013 (UTC)
- Care to contribute towards the page(s) in question (specifically those on "Support")? I'm not familiar with this area. --prime mover (talk) 19:16, 15 September 2013 (UTC)
- Makes good sense to me. The page is IMO not messy at all (except where there are templates for unfinished stuff). --prime mover (talk) 16:51, 17 September 2013 (UTC)