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diff --git a/math/math.h b/math/math.h
index df8f6af..8bbcc6c 100644
--- a/math/math.h
+++ b/math/math.h
@@ -25,5 +25,9 @@ int v3_zero(t_3dvec *vec);
 int v3_set(t_3dvec *vec,double *ptr);
 int v3_copy(t_3dvec *trg,t_3dvec *src);
 int v3_cmp(t_3dvec *a,t_3dvec *b);
+double v3_scalar_product(t_3dvec *a,t_3dvec *b);
+double v3_absolute_square(t_3dvec *a);
+double v3_norm(t_3dvec *a);
+int v3_per_bound(t_3dvec *a,t_3dvec *dim);
 
 #endif