
void AI_Deriv2_OSrecurs(double ***AI0, double ***AIX, double ***AIY, double ***AIZ,
			double ***AIXX, double ***AIXY, double ***AIXZ,
			double ***AIYY, double ***AIYZ, double ***AIZZ,
			struct coordinates PA, struct coordinates PB,
			struct coordinates PC, double gamma, int iang, int jang);

