稀疏过程下带有退保和分红策略的相依风险模型

本文在保费收入为复合Poisson过程,索赔次数{N_(1)(t),t≥0},退保次数{N_(2)(t),t≥0}和支付红利的保单数{N_(3)(t),t≥0}分别是保单到达数{M(t),t≥0}的p_(1),p_(2),p_(3)-稀疏过程的假定下,建立带有干扰的风险模型,运用鞅方法讨论该模型盈余过程的性质,给出其最终破产概率的表达式和Lundberg上界,并给出具体实例.     

几类广义正规子群与有限群的p-幂零性（英文）

In this paper, the influence of s-semipermutable, c~#-normal, subnormally embedded and ss-quasinormal subgroups on the p-nilpotency of finite groups is investigated and some recent results are generalized.