Commit 29c117af authored by Dan Frumin's avatar Dan Frumin

clarify that modalities can be heterogeneous

parent 94ced2c9
...@@ -7,9 +7,9 @@ Import bi. ...@@ -7,9 +7,9 @@ Import bi.
instantiated with a variety of modalities. instantiated with a variety of modalities.
For the purpose of MoSeL, a modality is a mapping of propositions For the purpose of MoSeL, a modality is a mapping of propositions
`M : PROP → PROP` (where `PROP` is a type of bi-assertions) that is `M : PROP1 → PROP2` (where `PROP1` and `PROP2` are BI-algebras)
monotone and distributes over finite products. Specifically, the following that is monotone and distributes over finite products. Specifically,
rules have to be satisfied. the following rules have to be satisfied:
P ⊢ Q emp ⊢ M emp P ⊢ Q emp ⊢ M emp
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