A Ghost at $\omega_1$
In the final chain of the countable powerset functor, we show that the set at index $\omega_1$, regarded as a transition system, is not strongly extensional because it contains a "ghost" element that has no successor even though its component at each successor index is inhabited. The metho...
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| Format: | Article |
| Language: | English |
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Logical Methods in Computer Science e.V.
2018-07-01
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| Series: | Logical Methods in Computer Science |
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| Online Access: | https://lmcs.episciences.org/2626/pdf |