some new things, mostly not working or finished

math/complex.h

@@ -0,0 +1,25 @@
+#ifndef COMPLEX_H
+#define COMPLEX_H
+
+typedef struct {
+    double re;
+    double im;
+} Complex;
+
+Complex complex_new(double re, double im);
+Complex complex_add(Complex a, Complex b);
+Complex complex_sub(Complex a, Complex b);
+Complex complex_mul(Complex a, Complex b);
+Complex complex_div(Complex a, Complex b);
+Complex complex_scale(Complex a, double alpha);
+Complex complex_conjugate(Complex a);
+Complex complex_reciprocal(Complex a);
+double complex_abs(Complex a);
+double complex_phase(Complex a);
+Complex complex_exp(Complex a);
+Complex complex_sin(Complex a);
+Complex complex_cos(Complex a);
+Complex complex_tan(Complex a);
+void complex_print(Complex a);
+
+#endif