Can someone explain to me how we find it?
Examples
Y10X-=
= |1,0>|1/2,-1/2> = √2/3 |3/2,-1/2> + √1/3|1/2,-1/2>
Y11X-=
= |1,1>|1/2,-1/2> = √1/3|3/2,1/2> + √2/3|1/2,1/2>
Y2-1X- =
= √4/5 | 5/2, -3/2> + √1/5 | 3/2, -3/2>
I understand it goes like YlmX± = |l,m>|s,ms> = a |jmax, ?> + b |jmin, ?>...