CAPACITY OF THE RANGE OF TREE-INDEXED RANDOM WALK

By introducing a new measure for the infinite Galton-Watson process and providing estimates for (discrete) Green's functions on trees, we establish the asymptotic behavior of the capacity of critical branching random walks: in high dimensions d >= 7, the capacity grows linearly; and in the critical dimension d = 6, it grows asymptotically proportional to n/log n.

Automated summary

By introducing a new measure for the infinite Galton-Watson process and providing estimates for (discrete) Green's functions on trees, the authors establish the asymptotic behavior of the capacity of critical branching random walks: in high dimensions d >= 7, the capacity grows linearly; and in the critical dimension d = 6, it grows asymptotically proportional to n/log n.