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I don't know this research, but I think the candle metaphor shouldn't be taken too far. The candle is probably more like a source of particles and the claim is

I don't know this research, but I think the candle metaphor shouldn't be taken too far. The candle is probably more like a source of particles and the claim is that if the particles reflect off the boundary and you can send particles from every direction from the center, then you come arbitrarily close to any other point in the room. Or something along those lines. Again I stress I don't know the research and haven't seen the paper and I'm just speculating.

thaumasiotes 7y ago
> then you come arbitrarily close to any other point in the room It looks like the claim is that all but a finite number of points are actually achieved. This is a stronger result -- you can easily prove from that claim that you can get arbitrarily close to any point (because a neighborhood of any radius contains an infinite number of points, and therefore contains a point that is achieved), but you can't go the other way. It's quite possible to be arbitrarily close to every point while failing to hit an infinite number of points.