A decomposition theorem for Ο1-convex se
β
Marilyn Breen
π
Article
π
1982
π
Elsevier Science
π
English
β 830 KB
A set S in 1 :" is said to he X,-convex if and only if S does not contain a visually independent subset having cardinality h', . It is natural tts ask when an h',-convex set may be expressed as a countable unI.,n of convex sets. Here i! is proved that if S is a closed h',-convex set in the plane and