...true.

Proofs of ergodicity [8] for such systems do not always apply for actual implementations, and they are also often not practical since they imply thousands of iterations instead of the usual number of fifty.

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...freeway.

Also, in this construction, different lines of public transit are not connected - if one wants to change transit lines, one first has to go, via a transfer link, back to the walking layer. In consequence, the transit layer consists of a number of unconnected lines.

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