Nonstandard analysis and the theory of shape
Frank Wattenberg (1978)
Fundamenta Mathematicae
Bronisław Wajnryb, Agnieszka Wiśniowska-Wajnryb (2012)
Fundamenta Mathematicae
Let Y be a closed 2-dimensional disk or a 2-sphere. We consider a simple, d-sheeted branched covering π: X → Y. We fix a base point A₀ in Y (A₀ ∈ ∂Y if Y is a disk). We consider the homeomorphisms h of Y which fix ∂Y pointwise and lift to homeomorphisms ϕ of X-the automorphisms of π. We prove that if Y is a sphere then every such ϕ is isotopic by a fiber-preserving isotopy to an automorphism which fixes the fiber pointwise. If Y is a disk, we describe explicitly a small set of automorphisms of...
Boris N. Apanasov (1991)
Inventiones mathematicae
Franz W. Kamber, Philippe Tondeur (1975)
Annales scientifiques de l'École Normale Supérieure
Pawel Traczyk (1988)
Manuscripta mathematica
Dunfield, Nathan M., Garoufalidis, Stavros (2004)
Algebraic & Geometric Topology
Allan Sieradski (1971)
Fundamenta Mathematicae
Gopal Prasad (1977)
Bulletin de la Société Mathématique de France
Okun, Boris (2001)
Algebraic & Geometric Topology
Whittlesey, Kim (2000)
Geometry & Topology
John Douglas Moore, James H. White (1978/1979)
Mathematische Zeitschrift
Heisuke Hironaka (1969)
Publications Mathématiques de l'IHÉS
Stephen G. Brick (1988)
Inventiones mathematicae
Carlos Ruiz Salguero, Joaquín Luna Torres (1982)
Collectanea Mathematica
Bruce Bennett (1976)
Compositio Mathematica
Július Korbaš (1993)
Mathematica Slovaca
András Szücs (1992)
Manuscripta mathematica
Korbaš, Július (1987)
Proceedings of the Winter School "Geometry and Physics"
Hamid Abchir (1996)
Manuscripta mathematica
András Szücs (1999)
Mathematica Slovaca