Prove thatMDSisNPC:
Minimum dominating set(MDS)
Instance: A graphGand an integerk.
Question: DoesGcontain a dominating set of size :E;;k?
(It is easy to show thatVCccMDS.LetG'andkbe an instance ofVC,then an instance ofMDSconsists ofG(constructed fromG'by adding, for every edgee,=(u,v) eG',a new vertexx,and edges(u,xj),(x,,v)) and k.)
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