/**
* Returns the (n-space) angle in radians between this vector and the vector parameter; the return
* value is constrained to the range [0,PI].
*
* @param v1 The other vector
* @return The angle in radians in the range [0,PI]
*/
public final double angle(GVector v1) {
return (Math.acos(this.dot(v1) / (this.norm() * v1.norm())));
}
