کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4650085 1342473 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the realization of double occurrence words
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات گسسته و ترکیبات
پیش نمایش صفحه اول مقاله
On the realization of double occurrence words
چکیده انگلیسی

Let SS be a double occurrence word, and let MSMS be the word’s interlacement matrix, regarded as a matrix over GF(2). Gauss addressed the question of which double occurrence words are realizable by generic closed curves in the plane. We reformulate answers given by Rosenstiehl and by de Fraysseix and Ossona de Mendez to give new graph-theoretic and algebraic characterizations of realizable words. Our algebraic characterization is especially pleasing: SS is realizable if and only if there exists a diagonal matrix DSDS such that MS+DSMS+DS is idempotent over GF(2).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Discrete Mathematics - Volume 309, Issue 6, 6 April 2009, Pages 1769–1773
نویسندگان
, , ,