Competing species superprocesses with infinite variance.
Under a well-known scaling, supercritical Galton–Watson processes converge to a non-degenerate non-negative random limit variable . We are dealing with the left tail (i.e. close to the origin) asymptotics of its law. In the Böttcher case (i.e. if always at least two offspring are born), we describe the precise asymptotics exposing oscillations (Theorem 1). Under a reasonable additional assumption, the oscillations disappear (Corollary 2). Also in the Böttcher case, we improve a recent lower deviation...
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