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sombor index under some graph products
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نویسنده
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rezaee abdolhosseinzadeh irandokht ,rahbarnia freydoon ,tavakoli mostafa
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منبع
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mathematics interdisciplinary research - 2022 - دوره : 7 - شماره : 4 - صفحه:331 -342
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چکیده
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let g=(v, e) be a graph with vertex set v(g) and edge set e(g). the sombor index of a graph g, so(g), is defined as ∑uv∈ e(g) √(d2u+d2v), where du is the degree of vertex u in v(g). in the present paper, we determine the lower bound for the sombor index of edge corona, r-edge and r-vertex corona products of two graphs. we also compute the exact value for the sombor index of the line graphs of subdivision of tadpol, ladder and wheel graphs.
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کلیدواژه
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sombor index ,edge corona ,r-vertex corona ,line graphs ,subdivision of tadpole graph
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آدرس
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ferdowsi university of mashhad, faculty of mathematical sciences, department of applied mathematics, iran, ferdowsi university of mashhad, faculty of mathematical sciences, department of applied mathematics, iran, ferdowsi university of mashhad, faculty of mathematical sciences, department of applied mathematics, iran
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پست الکترونیکی
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m_tavakoli@um.ac.ir
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Authors
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