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I received a request for another long-lost document:

I am wondering if there is any way I might obtain a copy of

The geometry of circles: Voronoi diagrams, Moebius transformations, convex hulls, Fortune's algorithm, the cut locus, and parametrization of shapes W.P. Thurston Technical Report, Princeton University, 1986.

Is there a scanned version somewhere or might some library stock it?

Can anyone help out?

For context: I gave a series of presentations in a EECS course with Dave Dobkin, and I wrote these notes to go with it. It was fun material at the time, but the notes were only moderately distributed.

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While people are at it, there was a paper that used to be distributed with the video "Outside-In" explaining the math in it (I think that it was coauthored by Thurston and Silvio Levi). Does anyone have a copy of it? – Andy Putman Sep 22 '10 at 3:06
@Andy Putname: Outside In is available from A.K. Peters, as a DVD, together with Not Knot and the video supplement Making Waves by Silvio Levy. (You can also still order videotape versions). Here is the link: The videotape should be available at many libraries, and probably the supplement. – Bill Thurston Sep 22 '10 at 3:27
Both "Outside In" and "Not Knot" are also available online at various places. For some reason I had convinced myself a while ago that it was no longer for sale [and none of the institutions I've been at have owned copies] -- thanks for pointing out the link! – Andy Putman Sep 22 '10 at 3:41
@Andy Putnam, I just mininterpreted your meaning. I don't have any problem (personally) with giving people links to the streaming versions --- I've done it myself. The video quality is of course much better on the DVD; the two forms have different roles. When we made the videos, our purpose was never commercial, but to show people aspects of mathematics they may not have encountered, and to enable them to catch on, enjoy and become interested in things that might have made no sense. My personal stake is that I want interested people to be able to see them. – Bill Thurston Sep 22 '10 at 11:22
@jc: "On the combinatorics and dynamics of iterated rational maps" has has now been edited and updated by Dierk Schleicher, and is published in the volume Complex Dynamics: Families and Friends which he edited (associated with thte John Hubbard 60th birthday conference). – Bill Thurston Sep 22 '10 at 19:09
up vote 14 down vote accepted

Here is the .tex not quite "as-is," but modified minimally so that it will compile: DTnotes.tex. And here is .pdf produced by compiling that .tex:  DTnotes.pdf.

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Joseph O'Rourke did what I should have thought to do myself: he wrote to David Dobkin, who still had a copy of a version of these notes in his email. I haven't yet gone over them to make them compile with a current tex environment, but here is a copy as-is. When I have a chance to fix it, I'll substitute a better version and I'll consider whether to put it in a more visible spot.

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