2021-03-06 01:08
src/ring_theory/polynomial/chebyshev.lean
chore(polynomial/chebyshev): changes names of chebyshev₁ to chebyshev.T and chebyshev₂ to chebyshev.U (#6519) …
Deleted polynomial.one_sub_X_pow_two_mul_derivative_chebyshev₁_eq_poly_in_chebyshev₁