/// <summary>
/// A method to divide a vector by 2.
/// </summary>
/// <param name="v">A vector.</param>
/// <returns>The division of v by 2: v / 2</returns>
public IVector2D <T> Div2(IVector2D <T> v)
{
return(new Vector2D <T>(Math.Div2(v.X),
Math.Div2(v.Y)));
}