Geodesic
On smooth points of boundaries of open sets
S. Rolewicz 1
1 Institute of Mathematics Polish Academy of Sciences Śniadeckich 8 P.O. Box 21 00-956 Warszawa 10, Poland
Studia Mathematica, Tome 191 (2009) no. 3, pp. 211-214 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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The notions of smooth points of the boundary of an open set and $\alpha (\cdot )$ intrinsically paraconvex sets are introduced. It is shown that for an $\alpha (\cdot )$ intrinsically paraconvex open set the set of smooth points is a dense $G_{\delta }$-set of the boundary.
DOI : 10.4064/sm191-3-2
Keywords: notions smooth points boundary set alpha cdot intrinsically paraconvex sets introduced shown alpha cdot intrinsically paraconvex set set smooth points dense delta set boundary

S. Rolewicz  1

1 Institute of Mathematics Polish Academy of Sciences Śniadeckich 8 P.O. Box 21 00-956 Warszawa 10, Poland 
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S. Rolewicz. On smooth points of boundaries of open sets. Studia Mathematica, Tome 191 (2009) no. 3, pp. 211-214. doi: 10.4064/sm191-3-2

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