کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4651493 1342554 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tight quadrangulations on the sphere
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات گسسته و ترکیبات
پیش نمایش صفحه اول مقاله
Tight quadrangulations on the sphere
چکیده انگلیسی

A quadrangulation is a simple graph on the sphere each of whose faces is quadrilateral. A quadrangulation G is said to be tight if each edge of G   is incident to a vertex of degree exactly 3. We prove that any two tight quadrangulations with n⩾11n⩾11 vertices, not isomorphic to pseudo double wheels, can be transformed into each other, through only tight quadrangulations, by at most 83n-763 rhombus rotations. If we restrict quadrangulations to be 3-connected, then the number of rhombus rotations can be decreased to 2n-222n-22.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Discrete Mathematics - Volume 306, Issue 2, 6 February 2006, Pages 278–283
نویسندگان
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