In case you recognize the Baez address and are wondering, it's unsurprisingly not this kind of root https://en.wikipedia.org/wiki/Root https://en.wikipedia.org/

In case you recognize the Baez address and are wondering, it's unsurprisingly not this kind of root https://en.wikipedia.org/wiki/Root https://en.wikipedia.org/wiki/Root , but, somewhat surprisingly to me, also not this kind of root https://en.wikipedia.org/wiki/Root_system https://en.wikipedia.org/wiki/Root_system . Instead it's this kind of root https://en.wikipedia.org/wiki/Root_of_a_polynomial https://en.wikipedia.org/wiki/Root_of_a_polynomial , which is really what I should have expected before thinking of root systems ….