Equation Icon  δδk(x),fV(x ) = δk (x)V(x ) + V (x)f ( φ(x)∕2 − 3φ(x)∕2 ) = χ(x )e e ∈ SL (2,ℝ )∕SO (2). (9.54 ) 0 − χ (x)e−φ(x)∕2