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a counterexample to a conjecture of jafari rad and volkmann
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نویسنده
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blidia mostafa ,chellali mustapha
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منبع
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communications in combinatorics and optimization - 2022 - دوره : 7 - شماره : 1 - صفحه:91 -92
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چکیده
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In this short note, we disprove the conjecture of jafari rad and volkmann that every 𝓇-vertex critical graph is 𝓇𝑅-vertex critical,where 𝓇 (𝐺) and 𝓇𝑅(𝐺) stand for the domination number andthe roman domination number of a graph 𝐺, respectively.
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کلیدواژه
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roman domination ,𝓇-vertex critical graphs ,𝓇𝑅-vertex critical graphs
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آدرس
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university of blida 1b.p. 270, department of mathematics, algeria, university of blida 1b.p. 270, department of mathematics, algeria
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پست الکترونیکی
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m_chellali@yahoo.com
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Authors
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