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Seminar

PSDS & EC Joint Seminar: The largest subcritical component in random graphs of preferential attachment type March 31, 2025 (02:00 PM PDT - 03:00 PM PDT)
Parent Program:
Location: SLMath: Eisenbud Auditorium, Online/Virtual
Speaker(s) Peter Mörters (Universität zu Köln)
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Keywords and Mathematics Subject Classification (MSC)
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Secondary Mathematics Subject Classification No Secondary AMS MSC
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The largest subcritical component in random graphs of preferential attachment type

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We identify the size of the largest connected component in a sub-critical inhomogeneous random graph with a kernel of preferential attachment type. The component is polynomial in the graph size with an explicitly given exponent, which is strictly larger than the exponent for the largest degree in the graph. This is in stark contrast to the behaviour of inhomogeneous random graphs with a kernel of rank one. The proof uses local approximation by branching random walks going beyond the weak local limit and large deviation results on killed branching random walks.

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The largest subcritical component in random graphs of preferential attachment type