∫u0u∞∫02⁢πhsp1m1⁡(u,ξ)⁢hsp1m1⁡(v,ξ)⁢hsp2m2⁡(u,ξ)⁢hsp2m2⁡(v,ξ)⁢(cos⁡(2⁢u)-cos⁡(2⁢v))⁢ⅆ⁡v⁢ⅆ⁡u=0,