Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1155 https://internationalpubls.com Distance Pair Antimagic Labeling on Cycle Related Graphs M. Bala1,*, T. Saratha Devi2 1Research Scholar (Reg. No. 20222052091003), Manonmaniam Sundaranar University, Abishekapatti - 627 012, Tirunelveli, Tamil Nadu, India. 2Department of Mathematics, Research Center, G. Venkataswamy Naidu College, Kovilpatti-628 502, Tamil Nadu, India. E-mails : 1 balamaths27@gmail.com , 2 rajanvino03@gmail.com * Corresponding author: M. Bala Article History: Received: 10/09/2024 Revised: 27/10/2024 Published: 14/11/2024 Abstract: A distance pair antimagic labeling of a graph 𝐺 with 𝑝 vertices is a bijection 𝑓: 𝑉(𝐺) ⟢ 𝑃 where 𝑃 = { Β±1,Β±2,β‹― , Β± 𝑝 2 , 𝑖𝑓 𝑝 𝑖𝑠 𝑒𝑣𝑒𝑛 0, Β±1, Β±2,β‹― , Β± π‘βˆ’1 2 , 𝑖𝑓 𝑝 𝑖𝑠 π‘œπ‘‘π‘‘ such that the induced weight function 𝑀: 𝑉(𝐺) ⟢ π‘Š defined by 𝑀(𝑣) = βˆ‘ 𝑓(𝑒) = π‘˜π‘–π‘’βˆˆπ‘(𝑣) is one-one, where 𝑁(𝑣) = {𝑒 ∈ 𝑉: 𝑒𝑣 ∈ 𝐸} is the open neighborhood of 𝑣 and the set of all weights π‘Š is either of the form {Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘ 2 } or {0, Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘βˆ’1 2 } according as 𝑝 is even or odd. In this paper, we explored the result on distance pair antimagic labeling of cycle related graphs. Also we investigated the closed distance magic labeling of circulant graph and its complement. Keywords: Graph labeling, distance antimagic, pair sum labeling, distance pair antimagic labeling. AMS Subject Classification(2010): 05C12, 05C78. 1. Introduction A magic square of order 𝑛 is an 𝑛 Γ— 𝑛 array whose entries are an arrangement of the integers 1,2,3, … , 𝑛2 in which all elements in any row, any column, the main diagonal or the main back diagonal add to the same sum π‘Ÿ. Vilfred [9] in his doctoral thesis introduced the concept of Ξ£-labeling. Following this, Miller et al. [5] and B.D. Acharya et al [1] studied the concepts under the name of neighborhood magic graphs. Further, Sugeng et al. [7] used the term distance magic labeling for the same concept. A distance magic labeling of a graph 𝐺 = (𝑉, 𝐸) of order 𝑛 is a bijection 𝑓: 𝑉(𝐺) β†’ {1,2,… , 𝑛} such that οƒ₯ οƒŽ = )( )( vNu kuf for all 𝑣 ∈ 𝑉. The constant π‘˜ is called the magic constant of the labeling 𝑓. A graph which admits a distance magic labeling is called a distance magic graph. In 2013, Kamatchi and Arumugam [3] introduced the concept of a distance antimagic graph. Motivated by these works and pair sum labeling [6] we introduced the concept of distance pair antimagic labeling [4]. In this paper, we present several results of distance pair antimagic labeling on cycle related graphs and complement of circulant graph. 2. Preliminaries Definition 2.1 A graph G is said to be distance antimagic if there is a bijection 𝑓: 𝑉(𝐺) β†’ {1,2, . . . , 𝑝} such that for every pair of distinct vertices π‘₯ and 𝑦 applies 𝑀(π‘₯) β‰  𝑀(𝑦). mailto:rajanvino03@gmail.com Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1156 https://internationalpubls.com Definition 2.2 A injective map 𝑓: 𝑉(𝐺) β†’ {Β±1,Β±2,β‹― ,±𝑝} is said to be pair sum labeling if the induced edge function 𝑓𝑒: 𝐸(𝐺) β†’ 𝑍\{0} defined by 𝑓𝑒(𝑒𝑣) = 𝑓(𝑒) + 𝑓(𝑣) is one-one and 𝑓𝑒(𝐸(𝐺)) is either of the form {Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘ž 2 } or {Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘žβˆ’1 2 } βˆͺ {Β±π‘˜π‘ž+1 2 } according as q is even or odd. Definition 2.3 Let 𝐺 be a (𝑝, π‘ž) graph. Let 𝑓: 𝑉(𝐺) ⟢ 𝑃 be a bijection where 𝑃 = { Β±1, Β±2,β‹― , Β± 𝑝 2 , 𝑖𝑓 𝑝 𝑖𝑠 𝑒𝑣𝑒𝑛 0, Β±1, Β±2,β‹― ,Β± π‘βˆ’1 2 , 𝑖𝑓 𝑝 𝑖𝑠 π‘œπ‘‘π‘‘ Then 𝑓 is called a distance pair antimagic (DPAM) labeling if the induced weight function 𝑀: 𝑉(𝐺) ⟢ π‘Š defined by 𝑀(𝑣) = βˆ‘π‘’βˆˆπ‘(𝑣) 𝑓(𝑣) = π‘˜π‘– is one-one, where 𝑁(𝑣) = {𝑒 ∈ 𝑉: 𝑒𝑣 ∈ 𝐸} is the open neighborhood of 𝑣 and the set of all weights π‘Š is either of the form {Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘ 2 } or {0,Β±π‘˜1, Β±π‘˜2, Β±π‘˜3, β‹― ,Β±π‘˜π‘βˆ’1 2 } according as 𝑝 is even or odd. A graph which admits distance pair antimagic labeling is called a distance pair antimagic graph. Definition 2.4 A function 𝑓 is called closed distance pair antimagic labeling, if we take closed neighborhood 𝑛[𝑣] instead of open neighborhood 𝑁(𝑣) in the previous definition. Definition 2.5 The 𝑛-sunlet graph πΆπ‘›βŠ™πΎ1 is the graph on 2𝑛 vertices obtained by attaching a pendant edge to each vertices of a cycle 𝐢𝑛 and it is denoted by 𝑆𝑛. Definition 2.6 The helm graph 𝐻𝑛 is the graph obtained from an wheel graph π‘Šπ‘› by adjoining a pendant edge at each vertex of the cycle. Definition 2.7 The triangular snake 𝑇𝑛 is obtained from a path 𝑃𝑛 by replacing each edge of the path by a triangle 𝐢3. Definition 2.8 The Gear graph 𝐺𝑛 is formed by adding a vertex between each pair of adjacent vertices of a wheel graph π‘Šπ‘›. Definition 2.9 The n-book graph is defined as the graph Cartesian product 𝐡𝑛 = 𝑆𝑛+1 Γ— 𝑃2, where 𝑆𝑛+1 is a star graph and 𝑃2 is the path graph on two vertices. Definition 2.10 The friendship graph is defined as the graph 𝐹𝑛 which consisting of n triangles with a common vertex. Definition 2.11 The Prism graph 𝐢𝑛 Γ— 𝐾2 is constructed by the Cartesian product of a cycle of length 𝑛 β‰₯ 3 and an edge. Definition 2.12 Resty [8] defined the following graph. For 𝑛 β‰₯ 4, the n-crossed prism graph obtained by taking two disjoint cycle graphs namely 𝐢𝑛 1 and 𝐢𝑛 2, where 𝑉(𝐢𝑛 1) = {𝑣1, 𝑣2, . . . , 𝑣𝑛} and 𝑉(𝐢𝑛 2) = {𝑒1, 𝑒2, . . . , 𝑒𝑛}, and adding edges 𝑒𝑠𝑣𝑠+1 for 𝑠 ∈ {1,3, . . . , 𝑛 βˆ’ 1} and π‘’π‘‘π‘£π‘‘βˆ’1 for 𝑑 ∈ {2,4, . . . , 𝑛}. The n-crossed prism graph denoted by 𝐢𝑃𝑛 . Definition 2.13 The circulant graph 𝐢(𝑛; 𝐷), where 𝐷 βŠ† {1,2,… , ⌊ 𝑛 2 βŒ‹} is the graph with vertex set {𝑣1, 𝑣2, … , 𝑣𝑛}, where 𝑣𝑖 and 𝑣𝑗 are adjacent if and only if there is a number 𝑑 ∈ 𝐷 such that 𝑖 + 𝑑 ≑ 𝑗(π‘šπ‘œπ‘‘ 𝑛) or 𝑗 + 𝑑 ≑ 𝑖(π‘šπ‘œπ‘‘ 𝑛). 3. Main Results Theorem 3.1 The sunlet graph 𝑆𝑛 is a distance pair antimagic graph if 𝑛 = 4,6,8, … Proof. Let 𝑉(𝑆𝑛) = {𝑣𝑖 , 𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛} be the vertex set and Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1157 https://internationalpubls.com 𝐸(𝑆𝑛) = {𝑣𝑖𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛} βˆͺ {𝑣𝑖𝑣𝑖+1: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} βˆͺ {𝑣1𝑣𝑛} be the edge set of 𝑆𝑛. Define 𝑓: 𝑉(𝑆𝑛) ⟢ {Β±1,Β±2,β‹― , ±𝑛} by 𝑓(𝑣𝑖) = { (βˆ’1)𝑖(𝑖), 𝑖𝑓 1 ≀ 𝑖 ≀ 𝑛 2 (βˆ’1)𝑖(𝑛 + 1 βˆ’ 𝑖), 𝑖𝑓 𝑛 2 < 𝑖 ≀ 𝑛 𝑓(𝑒𝑖) = { (βˆ’1) 𝑖+1 ( 𝑛 2 + 𝑖) , 𝑖𝑓 1 ≀ 𝑖 ≀ 𝑛 2 (βˆ’1)𝑖+1 ( 3𝑛 2 + 1 βˆ’ 𝑖) , 𝑖𝑓 𝑛 2 < 𝑖 ≀ 𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑣𝑖) = { 𝑛 2 + 4, 𝑖𝑓 𝑖 = 1 (βˆ’1)𝑖+1 ( 𝑛 2 + 3𝑖) , 𝑖𝑓 1 < 𝑖 < 𝑛 2 (βˆ’1)𝑖+12𝑛 βˆ’ 1, 𝑖𝑓 𝑖 = 𝑛 2 , 𝑛 2 + 1 (βˆ’1)𝑖+12𝑛 + 3( 𝑛 2 + 1 βˆ’ 𝑖) , 𝑖𝑓 𝑖 = 𝑛 2 + 2, 𝑛 2 + 3, . . . , 𝑛 βˆ’ 1 βˆ’ ( 𝑛 2 + 4) , 𝑖𝑓 𝑖 = 𝑛 𝑀(𝑒𝑖) = { (βˆ’1)𝑖(𝑖), 𝑖𝑓 1 ≀ 𝑖 ≀ 𝑛 2 (βˆ’1)𝑖(𝑛 + 1 βˆ’ 𝑖), 𝑖𝑓 𝑛 2 < 𝑖 ≀ 𝑛 Hence 𝑆𝑛 is a distance pair antimagic graph if 𝑛 = 4,6,8, … Corollary 3.2 The Helm graph 𝐻𝑛 is a distance pair antimagic graph if 𝑛 = 4,6,8,… By using Theorem 2.10 [4], If 𝐺 is a distance pair antimagic graph with even number of vertices, then the join graph 𝐺 + 𝐾1 is a distance pair antimagic graph. Theorem 3.3 The triangular snake graph 𝑇𝑛 is a distance pair antimagic graph for all 𝑛 β‰₯ 2. Proof. Let 𝑉(𝑇𝑛) = {𝑣𝑖: 1 ≀ 𝑖 ≀ 𝑛} βˆͺ {𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} be the vertex set and 𝐸(𝑇𝑛) = {𝑣𝑖𝑣𝑖+1: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} βˆͺ {𝑒𝑖𝑣𝑖 , 𝑒𝑖𝑣𝑖+1: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} be the edge set of 𝑇𝑛. Consider following two cases. Case(i): 𝑛 =is odd Figure 3.1 DPAM Labeling of 𝑇3. ( The vertex labels are in usual font and weights are in bold font) Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1158 https://internationalpubls.com Clearly from figure 3.1 𝑇3 is a distance pair antimagic graph. For 𝑛 = 5,7,9, . .. define 𝑓: 𝑉(𝑇𝑛) ⟢ {0, Β±1, Β±2,β‹― ,±𝑛 βˆ’ 1} by 𝑓(𝑣𝑖) = (𝑛 + 1) βˆ’ 2𝑖, if 𝑖 = 1,2,3, . . . , 𝑛 𝑓(𝑒𝑖) = 𝑛 βˆ’ 2𝑖, if 𝑖 = 1,2,3, . . . , 𝑛 βˆ’ 1 Then the induced vertex weight labeling are as follows. 𝑀(𝑣𝑖) = { 2𝑛 βˆ’ 5, 𝑖𝑓 𝑖 = 1 4(𝑛 βˆ’ 3) βˆ’ 8(𝑖 βˆ’ 2), 𝑖𝑓 𝑖 = 2,3,4, . . . , 𝑛 βˆ’ 1 βˆ’(2𝑛 βˆ’ 5), 𝑖𝑓 𝑖 = 𝑛 𝑀(𝑒𝑖) = 2(𝑛 βˆ’ 2𝑖) if 𝑖 = 1,2,3, . . . , 𝑛 βˆ’ 1 Case(ii): 𝑛 is even Figure 3.2 DPAM Labeling of 𝑇2 and 𝑇4. Clearly from figure 3.2 𝑇2 and 𝑇4 are distance pair antimagic graphs. For 𝑛 = 6,8,10, . .. define 𝑓: 𝑉(𝑇𝑛) ⟢ {0,Β±1,Β±2,β‹― , ±𝑛 βˆ’ 1} by 𝑓(𝑣1) = 𝑛 βˆ’ 1 = βˆ’π‘“(𝑣𝑛) and remaining vertices has following labeling 𝑓(𝑣𝑖) = { 𝑛 βˆ’ 2(𝑖 βˆ’ 1), 𝑖𝑓 1 < 𝑖 < 𝑛 2 𝑛 βˆ’ 2𝑖, 𝑖𝑓 𝑛 2 ≀ 𝑖 < 𝑛 𝑓(𝑒𝑖) = { 𝑛 βˆ’ 1 βˆ’ 2𝑖, 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛 2 βˆ’ 1 0, 𝑖𝑓 𝑖 = 𝑛 2 𝑛 βˆ’ 1 βˆ’ 2(𝑖 βˆ’ 1) 𝑖𝑓 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 𝑛 βˆ’ 1 Then the induced vertex weight labeling are as follows. 𝑣𝑖 𝑀(𝑣𝑖) 𝑖 = 1 2𝑛 βˆ’ 5 𝑖 = 2 3 + 4(𝑛 βˆ’ 4) 𝑖 = 3,4,5, . . . , 𝑛 2 βˆ’ 1 4(𝑛 + 1 βˆ’ 2𝑖) Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1159 https://internationalpubls.com 𝑖 = 𝑛 2 3 𝑖 = 𝑛 2 + 1 βˆ’3 𝑖 = 𝑛 2 + 2, 𝑛 2 + 3, . . . , 𝑛 βˆ’ 2 4(𝑛 + 1 βˆ’ 2𝑖) 𝑖 = 𝑛 βˆ’ 1 βˆ’(3 + 4(𝑛 βˆ’ 4)) 𝑖 = 𝑛 βˆ’(2𝑛 βˆ’ 5) 𝑒𝑖 𝑀(𝑒𝑖) 𝑖 = 1 2𝑛 βˆ’ 3 𝑖 = 2,3,4, . . . , 𝑛 2 βˆ’ 1 2(𝑛 + 1) βˆ’ 4𝑖 𝑖 = 𝑛 2 0 𝑛 2 + 1, 𝑛 2 + 2, . . . , 𝑛 βˆ’ 2 2(𝑛 βˆ’ 1) βˆ’ 4𝑖 𝑖 = 𝑛 βˆ’ 1 βˆ’(2𝑛 βˆ’ 3) Hence 𝑇𝑛 is a distance pair antimagic graph for all 𝑛 β‰₯ 2. Theorem 3.4 The n-gear graph 𝐺𝑛 is a distance pair antimagic graph, if 𝑛 = 4,6,8,… Proof. Let 𝑉(𝐺𝑛) = {𝑒0, 𝑒𝑖 , 𝑣𝑖: 𝑖 = 1,2,3, . . . , 𝑛} and 𝐸(𝐺𝑛) = {𝑒𝑖𝑣𝑖 , 𝑣𝑖𝑒𝑖+1: 𝑖 = 1,2,3, . . . , 𝑛 βˆ’ 1} βˆͺ {𝑣𝑛𝑒1} βˆͺ {𝑒0𝑒𝑖: 𝑖 = 1,2,3, . . . , 𝑛} be vertex set and edge set of 𝐺𝑛. Define 𝑓: 𝑉(𝐺𝑛) ⟢ {0, Β±1, Β±2,β‹― ,±𝑛} by the following two cases Case : (i) 𝑛 ≑ 2 π‘šπ‘œπ‘‘ 4 𝑒𝑖 𝑓(𝑒𝑖) 𝑖 = 0 0 𝑖 = 1,2,3,4, . . . , 𝑛 2 βˆ’ 1 𝑖 𝑖 = 𝑛 2 𝑛 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 𝑛 βˆ’ 1 𝑛 2 βˆ’ 𝑖 𝑖 = 𝑛 βˆ’π‘› 𝑣𝑖 𝑓(𝑣𝑖) 𝑖 = 1,2,3,4, . . . , 𝑛 2 𝑛 2 + (𝑖 βˆ’ 1) Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1160 https://internationalpubls.com 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 𝑛 βˆ’(𝑖 βˆ’ 1) Then the induced vertex weight labeling are as follows. 𝑒𝑖 𝑀(𝑒𝑖) 𝑖 = 1 βˆ’( 𝑛 2 βˆ’ 1) 𝑖 = 2,3,4, . . . , 𝑛 2 (𝑛 βˆ’ 1) + 2(𝑖 βˆ’ 1) 𝑖 = 𝑛 2 + 1 𝑛 2 βˆ’ 1 𝑖 = 𝑛 2 + 2, 𝑛 2 + 3, . . . , 𝑛 3 βˆ’ 2𝑖 𝑣𝑖 𝑀(𝑣𝑖) 𝑖 = 1,2,3, . . . , 𝑛 2 βˆ’ 2 2𝑖 + 1 𝑖 = 𝑛 2 βˆ’ 1 3𝑛 2 βˆ’ 1 𝑖 = 𝑛 2 𝑛 βˆ’ 1 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 𝑛 βˆ’ 2 𝑛 βˆ’ 1 βˆ’ 2𝑖 𝑖 = 𝑛 βˆ’ 1 βˆ’( 3𝑛 2 βˆ’ 1) 𝑖 = 𝑛 βˆ’(𝑛 βˆ’ 1) Case : (ii) 𝑛 ≑ 0 π‘šπ‘œπ‘‘ 4 𝑒𝑖 𝑓(𝑒𝑖) 𝑖 = 0 0 𝑖 = 1,2,3,4, . . . , 𝑛 4 2𝑖 βˆ’ 1 𝑖 = 𝑛 4 + 1, 𝑛 4 + 2, . . . , 𝑛 2 2(𝑖 βˆ’ 𝑛 4 ) 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 3𝑛 4 𝑛 + 1 βˆ’ 2𝑖 𝑖 = 3𝑛 4 + 1, 3𝑛 4 + 2, . . . , 𝑛 3𝑛 2 βˆ’ 2𝑖 𝑣𝑖 𝑓(𝑣𝑖) 𝑖 = 1,2,3, . . . , 𝑛 4 𝑛 βˆ’ 2(𝑖 βˆ’ 1) 𝑖 = 𝑛 4 + 1, 𝑛 4 + 2, . . . , 𝑛 2 2(𝑖 βˆ’ 1) + 1 Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1161 https://internationalpubls.com 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 3𝑛 4 βˆ’2(𝑛 + 1 βˆ’ 𝑖) 𝑖 = 3𝑛 4 + 1, 3𝑛 4 + 2, . . . , 𝑛 𝑛 + 1 βˆ’ 2𝑖 Then the induced vertex weight labeling are as follows. 𝑒𝑖 𝑀(𝑒𝑖) 𝑖 = 0 0 𝑖 = 1 1 𝑖 = 2,3, . . . , 𝑛 4 2(𝑛 + 1) βˆ’ 4(𝑖 βˆ’ 1) 𝑖 = 𝑛 4 + 1 𝑛 + 3 𝑖 = 𝑛 4 + 2, 𝑛 4 + 3, . . . , 𝑛 2 4(𝑖 βˆ’ 1) 𝑖 = 𝑛 2 + 1 βˆ’1 𝑖 = 𝑛 2 + 2, 𝑛 2 + 3, . . . , 3𝑛 4 βˆ’(4(𝑛 βˆ’ 𝑖) + 6) 𝑖 = 3𝑛 4 + 1 βˆ’(𝑛 + 3) 𝑖 = 3𝑛 4 + 2, 3𝑛 4 + 3, . . . , 𝑛 βˆ’(4 (𝑖 βˆ’ 𝑛 2 βˆ’ 1)) 𝑣𝑖 𝑀(𝑣𝑖) 𝑖 = 1,2,3, . . . , 𝑛 4 βˆ’ 1 4𝑖 𝑖 = 𝑛 4 𝑛 2 + 1 𝑖 = 𝑛 4 + 1, 𝑛 4 + 2, . . . , 𝑛 2 βˆ’ 1 4(𝑖 βˆ’ 𝑛 4 ) + 2 𝑖 = 𝑛 2 𝑛 2 βˆ’ 1 𝑖 = 𝑛 2 + 1, 𝑛 2 + 2, . . . , 3𝑛 4 βˆ’ 1 4 ( 𝑛 2 βˆ’ 𝑖) 𝑖 = 3𝑛 4 βˆ’( 𝑛 2 + 1) 𝑖 = 3𝑛 4 + 1, 3𝑛 4 + 2, . . . , 𝑛 βˆ’ 1 βˆ’(4 (𝑖 βˆ’ 3𝑛 4 ) + 2) 𝑖 = 𝑛 βˆ’( 𝑛 2 βˆ’ 1) Hence the n-gear graph 𝐺𝑛 is a distance pair antimagic graph, if 𝑛 = 4,6,8,… Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1162 https://internationalpubls.com Theorem 3.5 The book graph 𝐡𝑛 = 𝑆𝑛+1 Γ— 𝑃2 is a distance pair antimagic graph if 𝑛 β‰₯ 2. Proof. Let the vertex set of book graph 𝑉(𝐡𝑛) be {𝑒𝑖, 𝑣𝑖 : 𝑖 = 0,1,2,3, . . . , 𝑛} and the edge set be {𝑒0𝑒𝑖 , 𝑣0𝑣𝑖: 𝑖 = 1,2,3, . . . , 𝑛} βˆͺ {𝑒𝑖𝑣𝑖: 𝑖 = 0,1,2,3, . . . , 𝑛}. Define 𝑓: 𝑉(𝑆𝑛+1 Γ— 𝑃2) ⟢ {Β±1, Β±2,β‹― ,±𝑛 + 1} by 𝑓(𝑒0) = 1; 𝑓(𝑣0) = βˆ’1; 𝑓(𝑒𝑖) = 𝑖 + 1, 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛; 𝑓(𝑣𝑖) = βˆ’(𝑖 + 1), 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑒0) = (𝑛+1)(𝑛+2) 2 βˆ’ 1 𝑀(𝑒𝑖) = βˆ’π‘–, 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛 𝑀(𝑣0) = 1 βˆ’ (𝑛+1)(𝑛+2) 2 𝑀(𝑣𝑖) = 𝑖, 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛 Hence 𝐡𝑛 is a distance pair antimagic graph if 𝑛 β‰₯ 2. Theorem 3.6 The friendship graph 𝐹𝑛 is a distance pair antimagic graph. Proof. Let the vertex set of friendship graph 𝑉(𝐹𝑛) be {𝑣0, 𝑣1, 𝑣2, . . . , 𝑣2𝑛} and the edge set be {𝑣𝑖𝑣𝑖+1: 𝑖 = 1,3, . . . ,2𝑛 βˆ’ 1} βˆͺ {𝑣0𝑣𝑖: 𝑖 = 1,2,3, . . . ,2𝑛}. Define 𝑓: 𝑉(𝐹𝑛) ⟢ {0,Β±1,Β±2,β‹― , ±𝑛} by 𝑓(𝑣𝑖) = { 0, 𝑖𝑓 𝑖 = 0 𝑖+1 2 , 𝑖𝑓 𝑖 𝑖𝑠 π‘œπ‘‘π‘‘ βˆ’( 𝑖 2 ) , 𝑖𝑓 𝑖 𝑖𝑠 𝑒𝑣𝑒𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑣𝑖) = { 0, 𝑖𝑓 𝑖 = 0 βˆ’ ( 𝑖+1 2 ) , 𝑖𝑓 𝑖 𝑖𝑠 π‘œπ‘‘π‘‘ 𝑖 2 , 𝑖𝑓 𝑖 𝑖𝑠 𝑒𝑣𝑒𝑛 Hence 𝐹𝑛 is a distance pair antimagic graph. Theorem 3.7 The prism graph 𝐢𝑛 Γ— 𝐾2 is a distance pair antimagic graph. Proof. Let 𝑉(𝐢𝑛 Γ— 𝐾2) = {𝑣𝑖 , 𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛} be the vertex set and 𝐸(𝐢𝑛 Γ— 𝐾2) = {𝑣𝑖𝑣𝑖+1, 𝑒𝑖𝑒𝑖+1, 𝑣𝑖𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} βˆͺ {𝑒𝑛𝑒1, 𝑣𝑛𝑣1, 𝑣𝑛𝑒𝑛} be the edge set of 𝐢𝑛 Γ— 𝐾2. Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1163 https://internationalpubls.com Define 𝑓: 𝑉(𝐢𝑛 Γ— 𝐾2) ⟢ {Β±1,Β±2,β‹― , ±𝑛} by 𝑓(𝑣𝑖) = 𝑖, if 𝑖 = 1,2,3, . . . , 𝑛 𝑓(𝑒𝑖) = { βˆ’π‘›, βˆ’(𝑖 βˆ’ 1), 𝑖𝑓 𝑖 = 1 𝑖𝑓 𝑖 = 2,3,4, . . . , 𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑣𝑖) = 𝑖 + 1, 𝑖𝑓 𝑖 = 1,2,3, . . . , 𝑛 βˆ’ 1; 𝑀(𝑣𝑛) = 1 𝑀(𝑒𝑖) = { βˆ’(𝑛 βˆ’ 1), 𝑖𝑓 𝑖 = 1 βˆ’π‘›, 𝑖𝑓 𝑖 = 2 βˆ’(𝑖 βˆ’ 2), 𝑖𝑓 𝑖 = 3,4,5, . . . , 𝑛 Hence 𝐢𝑛 Γ— 𝐾2 is a distance pair antimagic graph. Theorem 3.8 The crossed prism 𝐢𝑃𝑛 is a distance pair antimagic graph if 𝑛 ≑ 0 (π‘šπ‘œπ‘‘ 4). Proof. Let 𝑉(𝐢𝑃𝑛) = {𝑣𝑖 , 𝑒𝑖: 1 ≀ 𝑖 ≀ 𝑛} be the vertex set of 𝐢𝑃𝑛 and edge sets as follows: 𝐸(𝐢𝑃𝑛) = {𝑣𝑖𝑣𝑖+1, 𝑣1𝑣𝑛: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} βˆͺ {𝑒𝑖𝑒𝑖+1, 𝑒1𝑒𝑛: 1 ≀ 𝑖 ≀ 𝑛 βˆ’ 1} and adding edges 𝑒𝑠𝑣𝑠+1 for 𝑠 ∈ {1,3, . . . , 𝑛 βˆ’ 1} and π‘’π‘‘π‘£π‘‘βˆ’1 for 𝑑 ∈ {2,4, . . . , 𝑛}, where 𝑣𝑖 , 𝑒𝑖 are inner and outer vertices of 𝐢𝑃𝑛. Define 𝑓: 𝑉(𝐢𝑃𝑛) ⟢ {Β±1,Β±2,β‹― , ±𝑛} by 𝑣𝑖 𝑓(𝑣𝑖) 𝑒𝑖 𝑓(𝑒𝑖) 𝑖 = 1 2 𝑖 = 1 1 𝑖 = 2 -2 𝑖 = 2 -1 𝑖 = 3,4,5, . . . , 𝑛 2 (βˆ’1)𝑖+1(2𝑖 βˆ’ 3) + 1 𝑖 = 3,4,5, . . . , 𝑛 2 (βˆ’1)𝑖+1 (2𝑖 βˆ’ 3) 𝑖 = 𝑛 2 + 1 𝑛 𝑖 = 𝑛 2 + 1 𝑛 βˆ’ 1 𝑖 = 𝑛 2 + 2 βˆ’π‘› 𝑖 = 𝑛 2 + 2 βˆ’(𝑛 βˆ’ 1) 𝑖 = 𝑛 2 + 3, 𝑛 2 + 4, . . . , 𝑛 (βˆ’1)𝑖+1[2(𝑛 βˆ’ 𝑖) + 4] 𝑖 = 𝑛 2 + 3, 𝑛 2 + 4, . . . , 𝑛 (βˆ’1)𝑖+1 2(𝑛 βˆ’ 𝑖) + 3 Then the induced vertex weight labeling are as follows. 𝑣𝑖 𝑀(𝑣𝑖) 𝑒𝑖 𝑀(𝑒𝑖) 𝑖 = 1 7 𝑖 = 1 6 𝑖 = 2 -7 𝑖 = 2 -6 𝑖 = 3,5, . . . , 𝑛 2 βˆ’ 1 βˆ’[6(𝑖 βˆ’ 1) + 1] 𝑖 = 3,5, . . . , 𝑛 2 βˆ’ 1 βˆ’[6(𝑖 βˆ’ 1)] 𝑖 = 4,6, . . . , 𝑛 2 6𝑖 βˆ’ 9 𝑖 = 4,6, . . . , 𝑛 2 6𝑖 βˆ’ 10 𝑖 = 𝑛 2 + 1 3 βˆ’ 6(𝑖 βˆ’ 1) 𝑖 = 𝑛 2 + 1 4 βˆ’ 6(𝑖 βˆ’ 1) Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1164 https://internationalpubls.com 𝑖 = 𝑛 2 + 2 6(𝑖 βˆ’ 2) βˆ’ 3 𝑖 = 𝑛 2 + 2 6(𝑖 βˆ’ 2) βˆ’ 4 𝑖 = 𝑛 2 + 3, 𝑛 2 + 5, . . . , 𝑛 βˆ’ 1 βˆ’[6(𝑛 βˆ’ 𝑖 + 1) + 3] 𝑖 = 𝑛 2 + 3, 𝑛 2 + 5, . . . , 𝑛 βˆ’ 1 βˆ’[6(𝑛 βˆ’ 𝑖 + 1) + 2] 𝑖 = 𝑛 2 + 4, 𝑛 2 + 6, . . . , 𝑛 6(𝑛 βˆ’ 𝑖 + 2) + 1 𝑖 = 𝑛 2 + 4, 𝑛 2 + 6, . . . , 𝑛 6(𝑛 βˆ’ 𝑖 + 2) Hence the crossed prism 𝐢𝑃𝑛 is a distance pair antimagic graph if 𝑛 ≑ 0 (π‘šπ‘œπ‘‘ 4). Theorem 3.9 The circulant graph 𝐢(2𝑛; {𝑑1, 𝑑2, 𝑛}) is a distance pair antimagic if 𝑛 = 𝑑1 + 𝑑2, 𝑑1 < 𝑑2 and 𝑛 > 3. Proof. Let 𝐺 = 𝐢(2𝑛; {𝑑1, 𝑑2, 𝑛}) and 𝑉(𝐺) = {𝑒1, 𝑒2, 𝑒3, . . . , 𝑒2𝑛} Define 𝑓: 𝑉(𝐺) ⟢ {Β±1,Β±2,β‹― ,±𝑛} by following two cases. Case (i): n is odd 𝑓(𝑒𝑖) = { βˆ’π‘–, 𝑖𝑓 𝑖 = 1,3,5, . . . , 𝑛 𝑖, 𝑖𝑓 𝑖 = 2,4,6, . . . , 𝑛 βˆ’ 1 𝑛 βˆ’ 𝑖, 𝑖𝑓 𝑖 = 𝑛 + 2, 𝑛 + 4, 𝑛 + 6, . . . ,2𝑛 βˆ’ 1 𝑖 βˆ’ 𝑛, 𝑖𝑓 𝑖 = 𝑛 + 1, 𝑛 + 3, 𝑛 + 4, . . . ,2𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑒𝑖) = { 𝑖, 𝑖𝑓 𝑖 = 1,3,5, . . . , 𝑛 βˆ’π‘–, 𝑖𝑓 𝑖 = 2,4,6, . . . , 𝑛 βˆ’ 1 𝑖 βˆ’ 𝑛, 𝑖𝑓 𝑖 = 𝑛 + 2, 𝑛 + 4, 𝑛 + 6, . . . ,2𝑛 βˆ’ 1 𝑛 βˆ’ 𝑖, 𝑖𝑓 𝑖 = 𝑛 + 1, 𝑛 + 3, 𝑛 + 4, . . . ,2𝑛 Case (ii): n is even 𝑓(𝑒𝑖) = { βˆ’π‘–, 𝑖𝑓 𝑖 = 1,3,5, . . . , 𝑛 βˆ’ 1 𝑖, 𝑖𝑓 𝑖 = 2,4,6, . . . , 𝑛 𝑖 βˆ’ 𝑛, 𝑖𝑓 𝑖 = 𝑛 + 1, 𝑛 + 3, 𝑛 + 5, . . . ,2𝑛 βˆ’ 1 𝑛 βˆ’ 𝑖, 𝑖𝑓 𝑖 = 𝑛 + 2, 𝑛 + 4, 𝑛 + 6, . . . ,2𝑛 Then the induced vertex weight labeling are as follows. 𝑀(𝑒𝑖) = { 𝑖, 𝑖𝑓 𝑖 = 1,3,5, . . . , 𝑛 βˆ’ 1 βˆ’π‘–, 𝑖𝑓 𝑖 = 2,4,6, . . . , 𝑛 𝑛 βˆ’ 𝑖, 𝑖𝑓 𝑖 = 𝑛 + 1, 𝑛 + 3, 𝑛 + 5, . . . ,2𝑛 βˆ’ 1 𝑖 βˆ’ 𝑛, 𝑖𝑓 𝑖 = 𝑛 + 2, 𝑛 + 4, 𝑛 + 6, . . . ,2𝑛 Hence 𝐢(2𝑛; {𝑑1, 𝑑2, 𝑛}) is a distance pair antimagic if 𝑛 = 𝑑1 + 𝑑2, 𝑑1 < 𝑑2 and 𝑛 > 3. Corollary 3.10 The circulant graph 𝐢̅(2𝑛; {𝑑1, 𝑑2, 𝑛}) is a closed distance pair antimagic, if 𝑛 = 𝑑1 + 𝑑2, 𝑑1 < 𝑑2 and 𝑛 > 3. Corollary 3.11 The circulant graph 𝐢̅(2𝑛; {𝑑1, 𝑑2}) is a distance pair antimagic, if 𝑛 = 𝑑1 + 𝑑2, 𝑑1 < 𝑑2 and 𝑛 > 3. Communications on Applied Nonlinear Analysis ISSN: 1074-133X Vol 31 No. 8s (2024) 1165 https://internationalpubls.com Corollary 3.12 The circulant graph 𝐢(2𝑛;𝐷) is a distance pair antimagic, if 𝑛 > 3 where 𝐷 βŠ† 𝐷𝑛 = {(𝑑𝑖 , 𝑑𝑗): 𝑑𝑖 + 𝑑𝑗 = 𝑛} and 𝑑𝑖 < 𝑑𝑗 . 4. Conclusion The distance pair antimagic labeling on cycle related graphs is discussed in this paper. In particular the distance pair antimagicness of prism and crossed prism is investigated for particular n. 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Walker, On distance magic labeling of graphs, J. Combin. Math. Combin. Comput., 71 (2009), 39-48. [8] Resty D and Salman A N M 2015 The rainbow connection number of an n-crossed prism graph and its corona product with a trivial graph, Procedia Computer Science, 2015 74 143- 150. [9] V. Vilfred, 𝛴-labelled graph and circulant graphs, Ph.D. Thesis, University of Kerala, Trivandrum, India, 1994.