Equation Icon  ( ) √2-- ( ) √2-- 1 ˆla = ---------- 1 + ζ¯ζ,ζ + ¯ζ,i¯ζ − iζ,− 1 + ζ ¯ζ ≡ ---Y00,-Y 01i . (1.1) 2(1 + ζ¯ζ) 2 2