proof of closeness of kernel functions is kernel closeness a pointwise product which is proof of closeness of kernel functions proof of closeness of kernel functions under pointwise prove closeness of two kernel functions under a pointwise product what is a proof of closeness of kernel functions? proof of closeness of a kernel function proof of closeness of kernel functions in pointwise product - kernel function proof of closeness of kernel functions under pointwise product how do we prove that pointwise product is a kernel function proof of closeness of kernel functions under pointwise product proof of closeness of kernel functions under pointwise product which statement is an example of closeness between kernel functions which is a proof of closeness of kernel functions? proof of closeness of two kernel functions under pointwise product proof of closeness of kernel functions under pointwise product proof of closeness of kernel functions what's closeness of kernel function what is proof of the closeness of kernel functions? what is proof of closeness of two kernel functions under pointwise product?