It has been shown that ⟨ ϕ n ⟩ {\displaystyle \langle \phi _{n}\rangle } , the expected number of species with abundance n, may be calculated by θ J ! n ! ( J − n ) !
O valor de ⟨ ϕ n ⟩ {\displaystyle \langle \phi _{n}\rangle } , o número de especies que se esperaban con abundancia n, pódese calcular con θ J ! n ! ( J − n ) !