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I'm confused somebody even uses a mathematical model of color. Human perception of color is certainly a matter of biology. I'd have expected this paper to be a study of retinal cell response saturation or some such. Which is whatever it is, never mind famous mathematician's opinions.

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> Human perception of color is certainly a matter of biology.

Of course it is. The mathematics is a model of human biology (in terms of the effects of interactions with different colours of light).

Mathematical models of the underlying electromagnetic phenomenon known as light already existed in the 19th century, but that's very different from the problem at hand.

Mathematical models of color can serve several useful purposes, even if they're not entirely accurate. As long as one keeps in mind that at best, they are descriptive, there can be valid use cases.

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