乘法群的层

sheaf of groups sheaf of ideal sheaf of ring groups of capital direct product of groups category of Abelian groups sheave of groups unimodularity of polycyclic groups theory of Lie groups theory of finite groups section of a sheaf space groups of... sheaf of planes head of sheaf multiplicative sheaf scaling of multiplicative utility function management of working groups composition of classroom groups six groups of meridians groups of organism groups of companies method of serial groups