V7/usr/include/math.h

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including files from this version of Unix. 
extern double fabs(), floor(), ceil(), fmod(), ldexp();
extern double sqrt(), hypot(), atof();
extern double sin(), cos(), tan(), asin(), acos(), atan(), atan2();
extern double exp(), log(), log10(), pow();
extern double sinh(), cosh(), tanh();
extern double gamma();
extern double j0(), j1(), jn(), y0(), y1(), yn();

#define HUGE	1.701411733192644270e38
#define LOGHUGE 39