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Mar 29 at 2:01 history edited Tim Campion CC BY-SA 4.0
added 15 characters in body
Mar 29 at 1:53 comment added Tim Campion math.stackexchange.com/questions/1424777/…
S Mar 28 at 12:07 history suggested Morgan Rogers CC BY-SA 4.0
removed repetition typo
Mar 28 at 11:05 comment added Morgan Rogers I think I can see how one would prove this, at least for an $\omega_1$-indexed diagram: we can construct its colimit in the category of topological vector spaces (I can't immediately see how the result is a Banach space, but continuing), then observe that the maps in the colimit cone must be bounded, since if the norms in the diagram are divergent in $\mathbb{R}$ then there is a countable divergent cofinal subsequence, which is impossible in $\omega_1$? I think I'm missing some details which would make this precise. Can you suggest a reference?
Mar 28 at 10:51 review Suggested edits
S Mar 28 at 12:07
Mar 28 at 10:48 vote accept Morgan Rogers
Mar 27 at 3:44 history answered Tim Campion CC BY-SA 4.0