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new upper bounds on the spectral radius of graphs
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نویسنده
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kargar maryam ,sistani tahereh
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منبع
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journal of mathematical extension - 2020 - دوره : 14 - شماره : 4 - صفحه:53 -66
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چکیده
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We employ the concept of 2 - degree of the vertices and , more generally , the number of walks between two vertices to introduce new upper and lower bounds for the spectral radius and the smallest eigenvalue of a graph . we , further , show how upper and lower bounds for the spectral radius are better than previous bounds in some cases
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کلیدواژه
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eigenvalue ,spectral radius ,walk ,2 - degree
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آدرس
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islamic azad university , kerman branch, department of mathematics, iran, islamic azad university, kerman branch, department of mathematic, iran
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پست الکترونیکی
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taherehsistani@gmail
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Authors
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