sledgehammer | : hammer : : signal_strength : WiFi-Jammer/DoS toolset | TCP library

In Isabelle, a statement of the type case _ of _ ⇒ _ | _ ⇒ _ | _ ⇒ _ | ... is a form of pattern matching.

You might want to take a look at §2.5.4 of Isabelle's tutorial (§2.5.5 and §2.5.6 are also useful). This question on pattern matching and the Wikipedia article may provide more information about pattern matching in general.

What you are missing is that there not guarantee that the patterns are exhaustive. If no pattern matches, the result is undefined.

Nitpick actually finds a counter-example automatically on your lemma:

Have you tried border: none; That should solve your issue

When you use function, you have to prove termination before you can use the pow_F.simps rules. You probably want to use fun instead (which proves termination automatically).

Inject Microsoft.Extensions.Hosting.IHostApplicationLifetime into your service and call StopApplication when needed.

Defining it recursively like this is indeed a bit tricky because termination is not guaranteed. What if fst t = {# snd t #}, or more generally snd t ∈# fst t? Then your function keeps running in circles and never terminates.

The easiest way, in my opinion, would be a non-recursive definition that does a ‘one-off’ replacement:

Assuming the left-hand side could use an arbitrary value between 0 and N, what about adding a more general lemma

If you don't want to tab through the cells at all, add self.table_view.setTabKeyNavigation(False)

https://doc.qt.io/qt-5/qabstractitemview.html#tabKeyNavigation-prop

This should help.

I don't think there is anything that automates this use case. You can avoid fiddling around with SOME by using the choice rule directly; it allows you to turn an ‘∀∃’ into a ‘∃∀’. However, you still have to convert P from a curried property with 5 arguments into a tupled one with two arguments first, and then unwrap the result again. I don't see a way around this. This is how I would have done it: