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Aug 26, 2019 at 15:16 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 26, 2019 at 13:17 comment added Iosif Pinelis @PascalLambrechts : Since you mentioned a homotopy in your post, I did suspect that actually you also needed the continuity of the extension in the initial position $x$. But, as you note, that also quickly follows from the answer. Anyhow, I am glad the answer made you happy. :-)
Aug 26, 2019 at 6:22 vote accept Pascal Lambrechts
Aug 26, 2019 at 6:21 comment added Pascal Lambrechts thank you for the answer ! Actually I also need the continuity of the extension at $T=\infty$ to be continuous w.r.t to $x$. But I see that this follows from the inequality in the displaymath after (4), which implies that $$\|y_\infty-y_t\|\leq \frac{1-r_t}{C},$$ and from the continuity for $T<\infty$ which follows from the lipschitz hypothesis on V. So this is exactly what I needed and makes me happy :-)
Aug 26, 2019 at 3:38 comment added Iosif Pinelis The solution is now fully formalized, streamlined, and simplified.
Aug 26, 2019 at 3:36 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 26, 2019 at 3:23 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 19:39 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 12:04 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 5:18 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 4:43 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 4:08 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 3:57 history edited Iosif Pinelis CC BY-SA 4.0
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Aug 25, 2019 at 3:22 history answered Iosif Pinelis CC BY-SA 4.0