Cross Domain Equivalent to Nyquist Sampling Theorem?
I'd say that this is not only "similar to a cross-domain equivalent to Nyquist's Sampling Theorem", but it simply is the sampling theorem. The sampling theorem does not specify the domains of the signals involved; it is rather a mathematical condition that a function of a continuous variable needs to satisfy such that it is perfectly represented by equidistant samples. It is irrelevant if the independent variable of that continuous function is time, frequency, space or anything else.