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math.PR2013★ 1 cited
Bootstrap percolation on Galton-Watson trees
Béla Bollobás, Karen Gunderson, Cecilia Holmgren +2
Bootstrap percolation is a type of cellular automaton which has been used to model various physical phenomena, such as ferromagnetism. For each natural number , the -neighbou…
math.CO2013
Minimal symmetric differences of lines in projective planes
Paul Balister, Béla Bollobás, Zoltán Füredi +1
Let q be an odd prime power and let f(r) be the minimum size of the symmetric difference of r lines in the Desarguesian projective plane PG(2,q). We prove some results about the fu…