∬x2+y2<1Rm,n(α)⁡(x+ⅈ⁢y)⁢Rj,ℓ(α)⁡(x-ⅈ⁢y)⁢(1-x2-y2)α⁢ⅆ⁡x⁢ⅆ⁡y=0,