Note that because the target space N need not possess any algebraic structure, J p k ( M , N ) {\displaystyle J_{p}^{k}(M,N)} also need not have such a structure.
注意，因为目标空间N不需要有代数结构， J p k ( M , N ) {\displaystyle J_{p}^{k}(M,N)} 也可以没有这样的结构。