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Connected Graphs With Nullity Two Are Non-Hypoenergetic
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نویسنده
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Khalashi Ghezelahmad Somayeh
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منبع
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كنفرانس نظريه گراف و تركيبيات جبري - 2020 - دوره : 11 - یازدهمین کنفرانس بین المللی نظریه گراف و ترکیبیات جبری ایران - کد همایش: 9919164009 - صفحه:74 -76
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چکیده
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The energy of a graph g, denoted by e(g), is defined as the sum of absolute values of all eigenvaluesof g. a graph of order n, whose energy is less than n, i.e., e(g) < n, is said to be hypoenergetic. graphsfor which e(g) ≥ n are called non-hypoenergetic. a graph of order n is said to be orderenergetic, if itsenergy and its order are equal, i.e., e(g) = n. it is proved that every connected graph with nullity 2 isnon-hypoenergetic. in particular, there are only two connected orderenergetic graphs with nullity 2.
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کلیدواژه
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Energy Of A Graph ,Non-Hypoenergetic Graphs ,Orderenergetic Graphs ,Nullity Of A Graph
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آدرس
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Science And Research Branch, Islamic Azad University, Science And Research Branch, Islamic Azad University, Mathematics, Iran
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پست الکترونیکی
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s.ghezelahmad@srbiau.ac.ir
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Authors
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