What's $/$ in the context of Fourier transforms? E.g. $H/G$ So in Wikipedia's article for Deconvolution, it's given that the deconvolution of $$f * g = h$$ is $$F = H/G$$ where $F, H, G$ are Fourier transforms of $f,g,h$. But what does $/$ mean? Is it division? Then how to divide Fourier transform with a Fourier transform?

It is the usual (point-wise) division of two functions. The Fourier transform of a function is another function.

The result $F=H/G$ comes from the fact that the Fourier transform of a convolution is the product of the Fourier transforms, this is known as the Convolution theorem.