I can't help but think of orthogonal frequency-division multiplexing and it's use in encoding data on multiple carrier frequencies, and it makes me wonder what other parallels we will discover between digital transmission technology for cross-domain stuff like this.
Not even cross-domain. (Nor cross-co-domain.)<p>Trigonometric polynomials are also polynomials. And linear spaces are all "the same". That is what the definition is <i>for</i>. Even the transpose-mapping is linear.