mathlib

60b77a76 - feat(analysis/special_functions/complex/circle): `real.angle.exp_map_circle` lemmas (#11969)

feat(analysis/special_functions/complex/circle): `real.angle.exp_map_circle` lemmas (#11969) Add four more `simp` lemmas about `real.angle.exp_map_circle`: `exp_map_circle_zero`, `exp_map_circle_neg`, `exp_map_circle_add` and `arg_exp_map_circle`.