Some remarks on general sum-connectivity coindex
2020 ◽
Vol 12
(1)
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pp. 29-35
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Let G = (V,E), V = {v1, v2,..., vn} be a simple connected graph with n vertices, m edges and a sequence of vertex degrees d1 ≥ d2 ≥ ··· ≥ dn > 0, di = d(vi). The general sumconnectivity coindex is defined as Ha(G) = ∑i j (di + dj) a , while multiplicative first Zagreb coindex is defined as P1(G) = ∏i j (di + dj). Here a is an arbitrary real number, and i j denotes that vertices i and j are not adjacent. Some relations between Ha(G) and P1(G) are obtained.
2020 ◽
Vol 12
(2)
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pp. 75-82
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2017 ◽
Vol 97
(1)
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pp. 1-10
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2021 ◽
Vol 10
(4)
◽
pp. 2115-2129
2007 ◽
Vol 3
(1)
◽
pp. 143-148
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