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Use objects, their relations (predicates) and functions, and quantifiers.
Either Wumpus World or Hoofers' Club.
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```dafny
greatest lemma G(x: int)
ensures x < 100;
{ // error: postcondition violation (when _k == 0)
H(x);
}
```
Relevant conversation:
> In your example above, the quantif…
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"A group that contains a token with a quantifier must not have a quantifier of its own unless the quantified token inside the group can only be matched with something else that is mutually exclusive w…
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#### Description of the problem
I'm trying to get a constrained quantifier notation of the form `∀ x ∈ l, P` that expands to `∀ x, x ∈ l -> P` (and similarly `∃ x ∈ l, P` which expands to `∃ x,…
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[Part 3 (Additional articles)](https://javascript.info/#tab-3)
[Chapter 7 (Regular expressions)](https://javascript.info/regular-expressions)
[Article 14 (Lookahead and lookbehind)](https://javascri…
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The first "Try it yourself example" of the chapter "4 Quantifiers and Equality" won't compile and throws the error `Unknown identifier 'take'` using Lean 3.28. I guess there should be an `assume` inst…
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If I give Z3 a recursive data type and a condition that is unsatisfiable for any finite instance, Z3 will go into an infinite loop during model creation, eventually timing out. The loop happens becau…
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## 📋 Anything to add?
- [ ] Invite the high CSTK winners (top 5ish in the last rounds)
- [ ] Create easy onboarding/process/guidance for them to jump in.
## 🎉 Subtasks
- [ ]
- [ ]
- [ ]
##…
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I'm seeing the following:
The regular expression `"^g\\s++[a-z]++(\\s++[a-z]++=[^\\s]*+)*+$"` is vulnerable to a denial of service attack (ReDOS)
However, this regex is using possessive quantifi…
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Context:
* quickvars (`?x`) are universal variables, always quantified at the top-level of the document
* blank nodes are existential variables, always quantified in the inner-most pair of brackets …