2012
DOI: 10.1007/s10711-012-9715-3
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On the cusped fan in a planar portrait of a manifold

Abstract: A planar portrait of a manifold is the pair of the image and the critical values of the manifold through a stable map into the plane. It can be considerd a geometric representation of the manifold drawn in the plane. The cusped fan is its basic local configuration. In this article, we focus on the fibreing structure over the cusped fan, and give its characterisation. As application, planar portraits of the real, complex, and quaternion projective plane, regular toric surfaces, and some sphere bundles over sphe… Show more

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Cited by 4 publications
(3 citation statements)
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“…(1) For example, in [10], [12] and [11], stable maps into the plane from fundamental 4-dimensional closed manifolds with good differential topological structures such as S 4 , the total space of a S 2 -bundle over S 2 , complex projective plane and manifolds represented as their connected sums whose Reeb spaces are 2-dimensional compact manifolds are presented. Moreover, the total space of a S 2 -bundle over S 2 , complex projective plane and manifolds represented as connected sums admit symplectic structures and in such cases, each inverse image of each regular value is a Lagrangian submanifold.…”
Section: Examplementioning
confidence: 99%
“…(1) For example, in [10], [12] and [11], stable maps into the plane from fundamental 4-dimensional closed manifolds with good differential topological structures such as S 4 , the total space of a S 2 -bundle over S 2 , complex projective plane and manifolds represented as their connected sums whose Reeb spaces are 2-dimensional compact manifolds are presented. Moreover, the total space of a S 2 -bundle over S 2 , complex projective plane and manifolds represented as connected sums admit symplectic structures and in such cases, each inverse image of each regular value is a Lagrangian submanifold.…”
Section: Examplementioning
confidence: 99%
“…Each piece is diffeomorphic to D 2 x D 2 and the momentum map on a piece is given by (|z| 2 , |u>| 2 ), where z, w are complex numbers in D 2 identified with the unit disc in C. We replace the momentum map on Mi with the cusped fan projection of r = 1. Since the last map is a perturbation of (\z\ 2 , |u>| 2 ), one can thus obtain a global perturbation of the momentum map ( [Kl,example 7.3 (c) t)^2 x 5 2 ttmCP 2 «"CP2.…”
Section: Toric 4-manifoldsmentioning
confidence: 99%
“…In the study of topology of mappings, Kobayashi studied a stable map whose singular value set consists of two concentric circles, the outer one is the image of definite folds and the inner one is the image of indefinite folds and cusps, where cusps are outward [8]. In his further study [7], he constructed an infinite number of stable maps on each of S 2 × S 2 and CP 2 #CP 2 that have the same singular value set but that are not right-left equivalent, using what he called four cusped fans. This theorem is proved by observing the 3-manifolds obtained as the preimage of an arc in the target space.…”
Section: Introductionmentioning
confidence: 99%