显然，式子（16）并不能直接得到，利用核映射的定义，对式（16）两边同

显然，式子（16）并不能直接得到，利用核映射的定义，对式（16）两边同时乘以 ，可得

結果 (英文) 1:

Obviously, equation (16) cannot be directly, using kernel mapping definitions, formula (16) both times, that they may have

結果 (英文) 2:

Clearly, equation (16) can not be obtained directly, using nuclear mapping definition (16) on both sides of the equation are multiplied, may be obtained

結果 (英文) 3:

Obviously, equation (16) and cannot be obtained directly, using the definition of kernel mapping, the type (16) multiplied by the two sides at the same time, available