void ditsum(double[],double[],long[],long,long,long,double[],
	double[]);
void divset(long,long[],long,long,double[]);
void dl7itv(long,double[],double[],double[]);
double dl7svn(long,double[],double[],double[]);
double dl7svx(long,double[],double[],double[]);
void dq7apl(long,long,long,double*,double[],long);
void dq7rfh(long*,long[],long,long,long,long,double*,
	double[],long,double[]);
double dr7mdc(long);
void drn2gb(double[][2],double[],double*,long[],long,long,long,
	long,long*,long*,long,double[],double[],double[],
	double[]);
void drnsgb(double*,double[],double[][2],double[],double*,long[][2],long[],
	long,long,long,long,long,long,long,
	long,double[],double[]);
void ds7cpr(double[],long[],long,long);
void dv2axy(long,double[],double,double[],double[]);
void dv7cpy(long,double[],double[]);
void dv7prm(long,long[],double[]);
void dv7scp(long,double[],double);