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Rice Wine
Iris
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60da0dab
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60da0dab
authored
Feb 02, 2017
by
Ralf Jung
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add warning about core of assertion not being non-expansive
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c8ae55b1
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theories/base_logic/lib/core.v
theories/base_logic/lib/core.v
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theories/base_logic/lib/core.v
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60da0dab
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@@ -5,7 +5,14 @@ Import uPred.
(** The "core" of an assertion is its maximal persistent part.
It can be defined entirely within the logic... at least
in the shallow embedding. *)
in the shallow embedding.
WARNING: The function "coreP" is NOT NON-EXPANSIVE.
This is because the turnstile is not non-expansive as a function
from iProp to (discreteC Prop).
To obtain a core that's non-expansive, we would have to add another
modality to the logic: a box that removes access to *all* resources,
not just restricts access to the core.
*)
Definition
coreP
{
M
:
ucmraT
}
(
P
:
uPred
M
)
:
uPred
M
:
=
(
∀
`
(!
PersistentP
Q
),
⌜
P
⊢
Q
⌝
→
Q
)%
I
.
...
...
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