The string of diamonds is nearly tight for rumour spreading
Comb. Probab. Comput., pp. 190-199, 2020.
For a rumour spreading protocol, the spread time is defined as the first time that everyone learns the rumour. We compare the synchronous push&pull rumour spreading protocol with its asynchronous variant, and show that for any $n$-vertex graph and any starting vertex, the ratio between their expected spread times is bounded by $O \left(...More
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