On Wednesday 29 November 2006 17:23, Philip Goetz wrote:

> What is a pointer-and-tag record structure, and what's it got to do
> with n-dim vectors?

I was using the phrase to cover the typical datastructures representing 
"objects" or "frames" in standard AI ( and much of mainstream programming) 
practice. Nothing special.

> I still don't know why you talk about using different numbers of
> dimensions simultaneously.  Seems to me that you can capture these
> invariants in whatever dimensionality you choose, so no need to talk
> about fractal representations.

At the lowest levels I don't get to choose, since the dimensionality is fixed 
by my input hardware. In that forced representation, the structure of the 
real world generates fractal shapes. At higher levels, I do want to choose -- 
and I have to work out which subspaces / transforms of the lower spaces to 
map into the higher ones. In fact, I can't just do this myself at design time 
-- the system itself needs to do it in learning new concepts. 

--Josh

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