hi and hello everyone , i am new with flutter and dart and i am start using isar database and everything is good and ok but i have problem with Sea ...

I'm trying to write a proof in the Isabelle "structured style" and I'm not sure how to specify the value of existential variables. Specifically, I'm t ...

I have a class that has String and List variables. While the application is running, I need to add values ​​for each model separately to this nested L ...

I am learning how to use Isar database for my Flutter app. I am trying to get the maximum value of a column. The Isar documentation suggests that I ca ...

I have been trying to find a way to open the isar database inspector. But I don't find any way to how to open the isar inspector. Please help. ...

Suppose I have some locale where a type-class can be inferred from the assumptions. Can I then instantiate the type-class in some way? Direct inst ...

I get 'Failed to apply initial proof method⌂' In Isabelle one could use rotate_tac I guess to get induction to work on the desired argument, what's ...

In the below code: I am in the state: However, I cannot reference this ra__, getting Bad name: "ra__"⌂, however, I need to reference it. How do ...

I'm having some issues trying to do exercise 4.5 of 'Concrete Semantics' in Isar: I'm getting Illegal schematic variable(s) in case "aSb"⌂ Also I f ...

I have decided to use Isar database in my next project and I find it much helpful when dealing with local data. I followed the quickstart guide in it ...

I wanted to write intermediate lemmas inside Coq proof scripts, e.g., inside SCRIPT in Proof. SCRIPT Qed. itself - similar to how one would do in Isar ...

Is there an option to make more than one collection with objects of the same type in Isar? Isar doc: https://isar.dev/ how i create single Collectio ...

I am trying to write a function balanced so that balanced n wis true if and only if S (an @ w) where an is list that contains n number of the same a ...

I was playing around with an example from the Isabelle/HOL tutorial to get a better understanding on the correspondence between Isar and Tactics proof ...

I was trying to recreate a simplified version of the natural numbers, for learning purposes (as it involves inductive definitions, recursive functions ...

Sometimes in a proof I find myself needing to accumulate results, but also needing use the last result, so I end up using "also then" for that purpose ...

When I have a lot of assumptions, sometimes I end up with a lot of temporary names that clutter the proof. I'm talking about things like this: and ...

I have theory file Test_Func.thy which I have copied in Isabelle src/HOL and which defines function add_123: And then I have Test_1.thy file which ...

Say I'm proving a theorem that assumes "n ≥ m" (both are natural numbers), and I apply induction on n. In the base case, the assumption is that "n = 0 ...

I am trying to prove the following basic theorem about the existence of the inverse function of a bijective function (to learn theorem-proving with Is ...