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39 #ifndef WCSLIB_WCSMATH
40 #define WCSLIB_WCSMATH
62 #define PI 3.141592653589793238462643
65 #define SQRT2 1.4142135623730950488
66 #define SQRT2INV 1.0/SQRT2
72 #define UNDEFINED 987654321.0e99
73 #define undefined(value) (value == UNDEFINED)