Nicholas :
"You can't get there from here". That's great ! We know that also in our
mountains ... and sometimes you can get there but can't get back here - so
much for symetry ...
In graph theory, it's non-connexity.
But what is interesting in this case is that the local vision introduces the
notion of "local non-connexity".
You can get from A to B, but not to C (seen from A)
Although you can get from B to C (seen from B)
... so much for transitivity ...
Something to do with scopes ?
Cheers
Bernard
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