Fulminate
发表于 2025-3-25 04:57:42
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Fibrillation
发表于 2025-3-25 09:08:18
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热情赞扬
发表于 2025-3-25 11:51:15
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祝贺
发表于 2025-3-25 15:57:00
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Urologist
发表于 2025-3-25 21:49:42
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A保存的
发表于 2025-3-26 03:44:13
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丰满有漂亮
发表于 2025-3-26 07:26:29
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Mast-Cell
发表于 2025-3-26 10:34:05
Faithful Embeddings of Planar Graphs on Orientable Closed Surfaces, .. It has been known that every 3-connected planar graph is faithfully embeddable on the sphere. We shall show that every 3-connected planar graph is faithfully embeddable on a suitable orientable closed surface other than the sphere unless it is one of seven exceptions.
繁荣地区
发表于 2025-3-26 16:02:28
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创新
发表于 2025-3-26 17:24:40
Nilpotent Symmetric Dessins of Class Two,obal orientation. A dessin is regular if its group of colour- and orientation-preserving automorphisms acts regularly on the set of edges, and a regular dessin is symmetric if it admits an external symmetry transposing the vertex colours. The symmetric dessins whose automorphism groups are nilpotent