 \sum_{n_{0}=0}^{m_{b+0}} \sum_{n_{0}=0}^{\textrm{min}(m_{b+0},|P|-0)}     \sum_{\substack{I_{0} \subseteq \ll 0 , m_{b+0} \rr \\ |I_{0}| = n_{0}}}     \sum_{\substack{I_{0} \subseteq \ll 0 , m_{b+0} \rr \\ |I_{0}| = n_{0}; \; I_{0} \cap I_{0} = \emptyset}} 