65

72

more than the number we must enclose the last graph in
a cut. Thus to express that that gath in question is
more than three we have the graph []. To assert
that it is not more than three we scribe [].
To assert that it is neither three nor more
than three, that is that it is less than three, we scribe
[diagram]. We now iterate the right hand graph in
the second cut of the left hand one
thus [diagram].
We extend the ligature by the rule of Iteration and join
them inside 3 cuts by the Rule of Insertion. We thus get,
after erasing the left hand part