Geodesic
Toric origami manifolds and multi-fans
Informatics and Automation, Algebraic topology, convex polytopes, and related topics, Tome 286 (2014), pp. 331-346

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The notion of a toric origami manifold, which weakens the notion of a symplectic toric manifold, was introduced by A. Cannas da Silva, V. Guillemin and A. R. Pires. They showed that toric origami manifolds bijectively correspond to origami templates via moment maps, where an origami template is a collection of Delzant polytopes with some folding data. Like a fan is associated to a Delzant polytope, a multi-fan introduced by A. Hattori and M. Masuda can be associated to an oriented origami template. In this paper, we discuss their relationship and show that any simply connected compact smooth $4$-manifold with a smooth action of $T^2$ can be a toric origami manifold. We also characterize products of even dimensional spheres which can be toric origami manifolds. 
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     author = {Mikiya Masuda and Seonjeong Park},
     title = {Toric origami manifolds and multi-fans},
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     volume = {286},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2014_286_a17/}
}
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Mikiya Masuda; Seonjeong Park. Toric origami manifolds and multi-fans. Informatics and Automation, Algebraic topology, convex polytopes, and related topics, Tome 286 (2014), pp. 331-346. http://geodesic.mathdoc.fr/item/TRSPY_2014_286_a17/