A range near the threshold, so that around 50% of them are connected, I believe.
No, I think there are different params for each, see the doc linked above on model params.
I’m going to assume you mean temporal memory because we have no TP implementation documented anywhere yet.
The spatial pooler learns spatial patterns on the proximal input. The TM learns distal patterns.
Both processes are actually occurring simultaneously, but it is easier to explain them separately.
No, a potential synapse is a where a cell has the potential to connect. The permanence could be 0.0 and it is still a potential synapse. If there is no potential synapse, that means there is not permanence at all, not that the permanence is 0.