康娜 李志全 楊麗婷
【摘? ?要】? ?圖的度量維數(shù)是圖論與組合優(yōu)化交叉領(lǐng)域的重要研究?jī)?nèi)容,邊度量維數(shù)是度量維數(shù)的一個(gè)變形。 給出了平面圖Γn的一個(gè)邊度量生成集,并證明了當(dāng)n≥6時(shí),平面圖Γn的邊度量維數(shù)為3。
【關(guān)鍵詞】? ?邊度量維數(shù);邊度量生成集;平面圖Γn
Study on the Edge Metric Dimension of Plane Graph Γn
Kang Na, Li Zhiquan, Yang Liting
(Hebei GEO University, Shijiazhuang 050031, China)
【Abstract】? ? The metric dimension of graph is an important object in the intersection between graph theory and combinatorial optimization. The edge metric dimension is a variation of metric dimension of graph. This paper presentsan edge metric generator of plane graph Γn, and shows that the edge metric dimension of Γnis 3 when n≥6.
【Key words】? ? ?edge metric dimension; edge metric generator; plane graphΓn
〔中圖分類(lèi)號(hào)〕? O157.5? ? ? ? ? ? ?〔文獻(xiàn)標(biāo)識(shí)碼〕? A ? ? ? ? ? ? ?〔文章編號(hào)〕 1674 - 3229(2022)02- 0005 - 03
0? ? ? 引言
1953年,Blumenthal[1]引入了一般度量空間中度量維數(shù)的概念。Slater[2]以及Harary和Melter[3]分別于1975年和1976年獨(dú)立地把解析集和度量維數(shù)的概念引入到圖中。圖的度量維數(shù)在醫(yī)藥化學(xué)[4]、機(jī)器巡航[5]等領(lǐng)域都有廣泛的應(yīng)用。目前圖的度量維數(shù)的研究已取得許多成果[6-9]。
設(shè)G是一個(gè)有限無(wú)向簡(jiǎn)單的連通圖,其中V(G)為頂點(diǎn)集,E(G)為邊集。圖G中兩頂點(diǎn)u、v之間的距離d(u,v)是以u(píng)和v為端點(diǎn)的最短路中所有邊的條數(shù)。對(duì)于頂點(diǎn)x∈V(G),若d(x,u)≠d(x,v),則稱(chēng)頂點(diǎn)x解析頂點(diǎn)u、v。設(shè)S是圖G中一個(gè)非空的頂點(diǎn)子集,如果G中的任意兩個(gè)頂點(diǎn)都能被S中的某個(gè)頂點(diǎn)解析,稱(chēng)S是圖G的解析集。圖G的基數(shù)最小的解析集稱(chēng)作圖G的度量基,其基數(shù)稱(chēng)作圖G的度量維數(shù),記作dim(G)。
2018年,Kelenc[10]等人將度量維數(shù)進(jìn)行了變形,給出了圖的邊度量維數(shù)的概念。此后,圖的邊度量維數(shù)問(wèn)題引起了許多學(xué)者的關(guān)注[11-16]。
1? ? ?主要結(jié)論
2? ? ?結(jié)語(yǔ)
圖的度量維數(shù)是圖論與組合優(yōu)化交叉領(lǐng)域的重要內(nèi)容。本文給出了平面圖Γn的一個(gè)邊度量生成集,并證明了當(dāng)n≥6時(shí),平面圖Γn的邊度量維數(shù)為3。本文研究對(duì)度量維數(shù)的研究與發(fā)展有積極的推動(dòng)作用。關(guān)于該平面圖的混合度量維數(shù)尚無(wú)結(jié)論,后續(xù)將進(jìn)一步研究平面圖Γn的混合度量維數(shù)及其他一些平面圖的(點(diǎn)、邊、混合)度量維數(shù)。
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