Naming roots and extrema of Chebyshev polynomials

Stream: mathlib4

[Yuval Filmus]

I define Finsets consisting of the roots and extrema of Chebyshev T and U polynomials over the reals. What should these be named? TRealRoots, TRealExtrema, URealRoots? Perhaps rootsTReal, extremaTReal, rootsUReal? Perhaps forget about the Real part, i.e., rootsT, extremaT, rootsU?