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22

part of the graph including every part that
will be affected by the operation and only
operate upon the new replica so produced.

Operation A. Two oddly enclosed lines of
identity in the same area may be joined;
and an evenly enclosed line of identity may be severed.
These operations are irreversible.

Operation B. From any line of identity lying
just outside a cut a branch may be made extend-
ing into the cut; and this operation is reversible.

Operation C. A disconnected ligature
can anywhere be scribed or erased.

But what is generally useful is to iterate an
evenly enclosed partial graph within an even
number of additional cuts or an [???], enclosed partial graph within an odd number of additional cuts, to extend a branch
from an evenly enclosed line of identity into an

part of the graph including every part that
will be affected by the operation and only
operate upon. The new replica so produced.

Operation A. Two oddly enclosed lines of
identity in the same area may be joined and an evenly enclosed line of identity may be severed
These operations are irreversible.
Operation B. From any line of identity