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111 A Second Look at Calculating<br />

is represented in the following way<br />

and has an inverse. The only rub is that my topologies are determined after the<br />

fact. I can’t define them until I calculate, and I can’t calculate à la Evans without the<br />

divisions they imply. What a terrible fix. I have to decide in advance—before any<br />

rules are given or applied—how to cut two randomly related, obviously homogeneous<br />

lines<br />

That’s one side of the triangle in the initial shape<br />

and one side of the chevron. These are the same two lines I didn’t know how to divide<br />

on page 75. I still don’t know where to cut them. Anything I try would only be a guess,

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