look at this equation  n^2 + 9 + 9  it's known as cdonald's theorem
"the statement n^2 + 9 + 9 is known as "cdonald's theorem" and when plotted on a graph models a uniformly curved line that somehow joins up with itself
"look at this equation  n^2 + 9 + 9  it's known as cdonald's theorem" What is the definition of "cdonald's theorem"?