Randomized Algorithms for Submodular Function
             Maximization with a k-System Constraint

         Shuang Cui 1 Kai Han * 1 Tianshuai Zhu 1 Jing Tang 2 Benwei Wu 1 He Huang 3

             Abstract                 sourcing (Singla et al., 2016; Han et al., 2018a), cluster-
   Submodular optimization has numerous applica-        ing (Gomes & Krause, 2010; Han et al., 2019), viral mar-
   tions such as crowdsourcing and viral market-        keting (Kempe et al., 2003; Han et al., 2018b), ...