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Merge pull request from h4iku/sim-space-patch

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Bisimulation: Added a space
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Philip Wadler 2019-08-12 11:44:08 +01:00 • committed by GitHub
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src/plfa/Bisimulation.lagda.md
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@ -414,7 +414,7 @@ In its structure, it looks a little bit like a proof of progress:
Since simulation commutes with values and `V` is a value, `V†` is also a value.
Since simulation commutes with substitution and `N ~ N†` and `V ~ V†`,
we have `N [ x := V] ~ N† [ x := V† ]`.
we have `N [ x := V ] ~ N† [ x := V† ]`.
* If the related terms are a let and an application of an abstraction,
there are two subcases:
@ -453,7 +453,7 @@ In its structure, it looks a little bit like a proof of progress:
Since simulation commutes with values and `V` is a value, `V†` is also a value.
Since simulation commutes with substitution and `N ~ N†` and `V ~ V†`,
we have `N [ x := V] ~ N† [ x := V† ]`.
we have `N [ x := V ] ~ N† [ x := V† ]`.
#### Exercise `sim⁻¹`