Congruence relations on cone semigroups.
K. Keimel (1971)
Semigroup forum
Emo Welzl, H. Alt, Kurt Mehlhorn, Hubert Wagener (1988)
Discrete & computational geometry
Jaume, Daniel A., Puente, Rubén (2005)
Beiträge zur Algebra und Geometrie
Mihai Turinici (1982)
Commentationes Mathematicae Universitatis Carolinae
Mircea Balaj (2006)
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
In this paper, we establish two constant selection theorems for a map whose dual is upper or lower semicontinuous. As applications, matching theorems, analytic alternatives, and minimax inequalities are obtained.
Martin Kochol (1994)
Mathematica Slovaca
Ana Forte Cunto (1991)
Publicacions Matemàtiques
G. Beer defined the visibility function of a set S and proved its continuity in the interior of S. It is proved here that the visibility function of a planar Jordan domain is continuous precisely at the cone points of the boundary of S.
Victor Klee, David Gale (1959)
Mathematica Scandinavica
Alesker, S. (1999)
Annals of Mathematics. Second Series
Daniel Hug (1996)
Manuscripta mathematica
F. Mignot, J. P. Puel (1981/1982)
Séminaire Équations aux dérivées partielles (Polytechnique)
Mentagui, D., El Hajioui, K. (2002)
Publications de l'Institut Mathématique. Nouvelle Série
Ganichev, M., Kalton, N.J. (2009)
The New York Journal of Mathematics [electronic only]
Krupa, G. (1998)
Journal of Convex Analysis
Andrea Colesanti (1998)
Bollettino dell'Unione Matematica Italiana
Josef Štěpán, P. Ševčík (2000)
Acta Universitatis Carolinae. Mathematica et Physica
Danica Jakubíková-Studenovská (1995)
Czechoslovak Mathematical Journal
Tadao Oda (1988)
Borovikova, Marina, Ibragimov, Zair (2008)
Bulletin of the Malaysian Mathematical Sciences Society. Second Series
Petty, C.M., McKinney, James R. (1987)
Portugaliae mathematica