The sum of two plane convex $C^\infty$ sets is not always $C^5$.
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Published
1990-06-01
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Articles
How to Cite
[1]
J. Boman, “The sum of two plane convex $C^\infty$ sets is not always $C^5$”., Math. Scand., vol. 66, pp. 216–224, Jun. 1990, doi: 10.7146/math.scand.a-12305.