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Timeline for On weak Hahn-Banach smoothness

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Aug 15, 2021 at 20:16 comment added Dirk Werner The equivalence that you mention is Theorem 4 in Yost's paper in Math. Scand. 50, 100-110 (1982); Zbl 0479.46008. It seems to me that the proof only uses weak Hahn-Banach smoothness. So the answer to your question is no.
Aug 15, 2021 at 13:50 comment added Tanmoy Paul This is 'Best approximation and intersection properties of balls' by David Yost, appeared in Bull Aust Math Soc (1979)
Aug 15, 2021 at 9:36 comment added Dirk Werner Which paper are you referring to?
Aug 14, 2021 at 21:29 history edited Tomasz Kania CC BY-SA 4.0
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Aug 14, 2021 at 10:33 history asked Tanmoy Paul CC BY-SA 4.0