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Classification of tilings of the 2-dimensional sphere by congruent triangles, (2002)

by Y Ueno, Y Agaoka
Venue:revised 8 Nov and 22
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Tilings of the sphere with right triangles I: The asymptotically right families

by Robert J. MacG. Dawson, Blair Doyle - ELECTRON J. COMBIN , 2006
"... Sommerville [10] and Davies [2] classified the spherical triangles that can tile the sphere in an edge-to-edge fashion. Relaxing this condition yields other triangles, which tile the sphere but have some tiles intersecting in partial edges. This paper determines which right spherical triangles withi ..."
Abstract - Cited by 7 (1 self) - Add to MetaCart
Sommerville [10] and Davies [2] classified the spherical triangles that can tile the sphere in an edge-to-edge fashion. Relaxing this condition yields other triangles, which tile the sphere but have some tiles intersecting in partial edges. This paper determines which right spherical triangles within certain families can tile the sphere.
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... 13 (2006), #R48 6sFigure 2: Examples of edge-to-edge tilings circle composed of congruent edges,until vertices match up again. (For a clear account of these the reader is referred to Ueno and Agaoka =-=[11]-=-.) There are also a large number of non-edge-to-edge tilings with these triangles, which we shall not attempt to enumerate here; some of the possibilities are described in [3]. iv) The(90 ◦ , 90 ◦ − 1...

Dihedral f-tilings of the sphere by triangles and well centered quadrangles

by Ana M. D’Azevedo Breda, Altino F. Santos , 2006
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Spherical F-Tilings by Triangles and r-Sided Regular Polygons, r ≥ 5

by Catarina P. Avelino , Altino F. Santos , 2008
"... The study of dihedral f-tilings of the sphere S² by spherical triangles and equiangular spherical quadrangles (which includes the case of 4-sided regular polygons) was presented in [3]. Also, in [6], the study of dihedral f-tilings of S² whose prototiles are an equilateral triangle (a 3-sided regula ..."
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The study of dihedral f-tilings of the sphere S² by spherical triangles and equiangular spherical quadrangles (which includes the case of 4-sided regular polygons) was presented in [3]. Also, in [6], the study of dihedral f-tilings of S² whose prototiles are an equilateral triangle (a 3-sided regular polygon) and an isosceles triangle was described (we believe that the analysis considering scalene triangles as the prototiles will lead to a wide family of f-tilings). In this paper we extend these results, presenting the study of dihedral f-tilings by spherical triangles and r-sided regular polygons, for any r ≥ 5. The combinatorial structure, including the symmetry group of each tiling, is given in Table 1.

Tilings of the Sphere by Edge Congruent Pentagons

by Ka Yue Cheuk, Ho Man Cheung, Min Yan , 2013
"... ..."
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Angle Combinations in Spherical Tilings by Congruent Pentagons

by Hoiping Luk, Min Yan , 2014
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CLASSIFICATION OF SPHERICAL TILINGS BY CONGRUENT QUADRANGLES OVER PSEUDO-DOUBLE WHEELS (I) -- A SPECIAL TILING BY CONGRUENT CONCAVE Quadrangles

by Yohji Akama , 2014
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A class of spherical dihedral f-tilings

by A. M. Breda, P. S. Ribeiro, Altino F. Santos, Centro De Matematica, A. M. Breda, P. S. Ribeiro, Altino F. Santos - European Journal of Combinatorics
"... CM{UTAD, Preprint number 1 centro de matematica cm{utad ..."
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CM{UTAD, Preprint number 1 centro de matematica cm{utad
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...f isometric foldings [9]. The study of these special class of tilings was initiated in [1] with a complete classification of all spherical monohedral f-tilings. Ten years latter Y. Ueno and Y. Agaoka =-=[10]-=- have established the complete classification of all triangular spherical monohedral tilings (which obviously includes the monohedral f-tilings). Robert Dawson has also been interested in special clas...

Tilings of the sphere with right triangles III: the asymptotically obtuse families

by Robert J. Macg Dawson, Blair Doyle
"... families ..."
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...ngles in 1967 (apparently without knowledge of Sommerville’s work), allowing any combination of angles at a vertex. Davies’ work omitted many details; these were filled in recently by Ueno and Agaoka =-=[9]-=-. Non-edge-to-edge tilings were apparently first considered in [2], where a complete classification of isosceles spherical triangles that tile the sphere was given. In [3], it was shown that, with one...

Combinatorial tilings of the sphere by pentagons

by Min Yan - Elec. J. of Combi
"... Abstract A combinatorial tiling of the sphere is naturally given by an embedded graph. We study the case that each tile has exactly five edges, with the ultimate goal of classifying combinatorial tilings of the sphere by geometrically congruent pentagons. We show that the tiling cannot have only on ..."
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Abstract A combinatorial tiling of the sphere is naturally given by an embedded graph. We study the case that each tile has exactly five edges, with the ultimate goal of classifying combinatorial tilings of the sphere by geometrically congruent pentagons. We show that the tiling cannot have only one vertex of degree > 3. Moreover, we construct earth map tilings, which give classifications under the condition that vertices of degree > 3 are at least of distance 4 apart, or under the condition that there are exactly two vertices of degree > 3.
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...h Fund 605610 and 606311. the electronic journal of combinatorics 20(1) (2013), #P54 1 algorithm for enumerating various classes of combinatorial tilings. For another research direction on the combinatorial aspects of tiling, see Schulte [10]. Our interest in the combinatorial tiling arises from the classification of edge-to-edge and monohedral tilings of the sphere. The tiles in such a tiling are all congruent and must be triangles, quadrilaterals, or pentagons. The classification of the triangular tilings of the sphere was started by Sommerville [11] in 1923 and completed by Ueno and Agaoka [12] in 2002. We are particularly interested in the pentagonal tilings, which we believe is relatively easier to study than the quadrilateral tilings because 5 is the “other extreme” among 3, 4, 5. In [7], we classified the tilings of the sphere by 12 congruent pentagons, where 12 is the minimal number of pentagonal tiles. Unlike the triangle case, where the congruence in terms of the edge length is equivalent to the congruence in terms of the angle, we needed to study different kinds of congruences separately, and then obtained the final classification by combining the classifications of differen...

Tilings of the Sphere by Geometrically Congruent Pentagons I

by Ka Yue Cheuk, Ho Man Cheung, Min Yan , 2014
"... ..."
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