Group Lifecycle Dichotomy -Group Cascade Tree Definition: Group Cascade Tree. a directed graph where each group member is a node, and a directed edge from u to v is constructed if u(inviter) successfully invites v(invitee) to the group Example of long-term grou WeChat Group Group Cascade Tree →自中 5。 Example of short-term gro10 Group Lifecycle Dichotomy – Group Cascade Tree Definition: Group Cascade Tree. A directed graph where each group member is a node, and a directed edge from u to v is constructed if u (inviter) successfully invites v (invitee) to the group. Invite Group Cascade Tree Invite WeChat Group Example of long-term groups Example of short-term groups