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36 #ifndef WCSLIB_WCSMATH
37 #define WCSLIB_WCSMATH
59 #define PI 3.141592653589793238462643
62 #define SQRT2 1.4142135623730950488
63 #define SQRT2INV 1.0/SQRT2
69 #define UNDEFINED 987654321.0e99
70 #define undefined(value) (value == UNDEFINED)