Theorem Orientation.left_ne_zero_of_oangle_eq_neg_pi_div_two

Modification history

2023-06-13 08:12
Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean
feat: port Geometry.Euclidean.Angle.Oriented.Basic (#4966)
Added Orientation.left_ne_zero_of_oangle_eq_neg_pi_div_twoView on Github →