PENENTUAN BILANGAN KROMATIK LOKASI GRAF THORN DARI GRAF JAHANGIR Th(J9(l1, l2,..., l9))

Authors

  • Abdi Musra
  • Lyra Yulianti
  • Des Welyyanti

DOI:

https://doi.org/10.25077/jmu.8.1.341-344.2019

Abstract

Bilangan kromatik lokasi pada graf pertama kali dikaji oleh Chartrand dkk (2002). Konsep ini merupakan pengembangan dari konsep dimensi partisi dan pewarnaan graf. Misalkan c adalah suatu pewarnaan titik pada graf G dengan c(u) 6= c(v) untuk u dan v yang bertetangga di G. Misalkan Ci adalah himpunan titik-titik yang diberi warna i, yang selanjutnya disebut kelas warna ke-i, maka Π = {C1, C2,..., Ck} adalah himpunan yang terdiri dari kelas-kelas warna ke-i dari V(G). Kode warna cΠ(v) dari v adalah k-pasang terurut (d(v,C1), d(v,C2),..., d(v,Ck)) dengan d(v,Ci) = min {(d(v,x) | x ∈ Ci} untuk 1 ≤ i ≤ k. Jika setiap titik pada G mempunyai kode warna yang berbeda, maka c disebut pewarnaan lokasi G. Banyaknya warna minimum yang digunakan untuk pewarnaan lokasi disebut bilangan kromatik lokasi dari G, dan dinotasikan dengan χL(G).

Kata kunci : graf Th(J9(l1, l2,..., l9)), bilangan kromatik lokasi.

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Published

05-07-2019

Issue

Vol. 8 No. 1 (2019)

Section

Articles

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