Equation Icon  (r2 − ˆa2) (r2 − aˆ2 ) ˆa ω = ----2---(d τ − ˆasin2𝜃dϕ ), &tidle;ω = ----2----(dϕ + --2----2-dτ) (97 ) ˆρ ˆρ (r − ˆa )