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diff --git a/src/vector.h b/src/vector.h
index 81a715f..6f11a32 100644
--- a/src/vector.h
+++ b/src/vector.h
@@ -32,6 +32,11 @@ class Vector
 		Vector& operator/=(double const v);		// Vector divided by constant self-assignment
 		Vector& operator+=(Vector const v);		// Vector plus Vector self-assignment
 		Vector& operator+=(double const v);		// Vector plus constant self-assignment
+		Vector& operator-=(Vector const v);		// Vector minus Vector self-assignment
+		Vector& operator-=(double const v);		// Vector minus constant self-assignment
+
+		bool operator==(Vector const v);		// Check for equality
+		bool operator!=(Vector const v);		// Check for inequality
 
 		Vector Unit(void);
 		double Magnitude(void);