The subring e Ω e is a prime kernel ring ( or primitive kernel ring) if and only if e Ω eK. 子环eΩe为质核环(本原核环),当且仅当eΩeK。
After selection suitable kernel function, Nuclear function with parameter in the primitive spatial is equivalent to inner product with parameter in the renewable Hilbert space, its makes linear classification to be easier. 在选取适当的核函数后,在原始空间带参数的核函数相对于在可再生希尔伯特空间中带参数的内积,使其线性分类更加容易。