In particular, if T is a spanning tree of G, we shall call its complement T 'a cotree. 如果T是G的一棵生成树,我们称它的补集T'为一副树。
The conditions are determined from the circuit topology and the circuit-theoretic properties for both tree and cotree resistors. 条件决定于电路的拓扑结构和电阻器的电路理论性质。