The sum of two plane convex C... sets is not always C...
Mathematica Scandinavica, Tome 66 (1990) no. 1, pp. 216-224

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Zbl
Mots-clés : sum of convex bodies, differentiability properties of convex bodies
Jan Boman. The sum of two plane convex C... sets is not always C.... Mathematica Scandinavica, Tome 66 (1990) no. 1, pp. 216-224. http://geodesic.mathdoc.fr/item/MS2_1990__66_1_167106/
@article{MS2_1990__66_1_167106,
     author = {Jan Boman},
     title = {The sum of two plane convex {C...} sets is not always {C...}},
     journal = {Mathematica Scandinavica},
     pages = {216--224},
     year = {1990},
     volume = {66},
     number = {1},
     zbl = {0739.52003},
     url = {http://geodesic.mathdoc.fr/item/MS2_1990__66_1_167106/}
}
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