This comment was made to Michael Silverblatt on one of DFW's Bookwork interviews...
Michael Silverblatt - "...something came into my head that may be entirely imaginary, which seemed to be that the book was written in fractals?"
David Foster Wallace - "Expand on that."
Michael Silverblatt - "It occured to me that the way in which the material is presented allows for a subject to be announced in a small form, then there seems to be a fan of subject matter - other subjects - and then it comes back in a second form containing the other subjects in small, and then comes back again as if what were being described were, and I don't know this kind of science, but it just, I said to myself: 'this must be fractals.' "
DFW - "It's, uh, I've heard you were an acute reader. That's one of the things structurally going on, it's actually structured like something called a Sierpinski gasket, which is a very primitave kind of pyramidal fractal. Actually, though, what was structured as a Sierpinski gasket was the draft that I delievered to Michael [his editor] in `94, and it went through some, I think, mercy cuts, so it's probably kind of a lopsided Sierpinski gasket now, but it's interesting, that's one of the structural ways it's supposed to come together."
It goes on from there, of course, but the important part is Mr. Silverblatt's second comment - that sums it up pretty perfectly, I think.
You can download the rest of the interview
here.