∫-∞zBi⁡t⁢ⅆ⁡t=∫0zBi⁡t⁢ⅆ⁡t=π⁢Bi′⁡z⁢Gi⁡z-Bi⁡z⁢Gi′⁡z=π⁢Bi⁡z⁢Hi′⁡z-Bi′⁡z⁢Hi⁡z.