How can I recover the Pure lambda expression associated with a proof in Isabelle?...

Isabelle/ZF infix definition issue...

Isabelle/ZF nat inequality...

Breaking conjunctions of the form &&& into subgoals in Isabelle...

Proving two bindings equal in Nominal Isabelle...

Is rule method with assumption discharge deprecated in Isabelle?...

Isabelle does not evaluate lemma...

How to model/formalize the change of the variable (change of world) in Isabelle/HOL?...

Induction on a well-founded order in Isabelle...

Defining function with several bindings in Isabelle...

Are purple colored Isabelle proofs valid?...

Isabelle's automatic solver does not find the proper theorem...

Diagonalising a finite set of infinite sets...

Is the process of proving using Isabelle's theorem prover coded in programming mode and then ver...

How do I prove that an object does not interpret a locale?...

Why the odd-even cases differ?...

Is induction required in this Isabelle proof?...

Why would adding a definition change type-correctness of a locale import?...

How to create appropriate lemmas to prove this lemma in Isabelle?...

How do I remove quotes/cartouches from document output on Isabelle?...

What is wrong with this Isabelle proof?...

How does one use basic propositional rules in Isar to prove `A ⟶ A ∨ B`?...

How to build session in Isabelle. (An example for AFP)...

What's the difference between `overloading` and `adhoc_overloading`?...

How to quickly get started with Isabelle's formal language standard to formally describe modelin...

How do I display brackets around assumptions in Isabelle/jEdit?...

Existance proofs with polymorphic types...

How to prove this simple theorem in Isabelle?...

Isabelle use Locale or Context outside of any locale...

What's the difference between "arith" and "presburger" in Isabelle?...