Proving termination of Takeuchi function in Isabelle...

In Isabelle, what do the angle brackets and double asterisks mean?...

Isabelle confused by a previous lemma?...

Defining a subclass with parameters in Isabelle...

Problems with termination of a recursive function using zip, map, and products...

Instantiating axioms about Sequents explicitly...

Applying axioms about Sequents...

How can I define syntax for a binder with an additional argument in Isabelle?...

Isabelle/HOL: What does the THE construct denote?...

Isabelle/HOL: Is there a concise notation for an arbitrary value of a type?...

How can I instantiate a typeclass at =>?...

Isabelle: What if a session needs more than one parent session?...

Importing classes into a locale in Isabelle and other related questions...

What support does Isabelle have for relations represented by binary predicates?...

Isabelle: Wellsortedness error...

Are inductive definitions finitely generated in Isabelle?...

Reasoning about the entirety of a codatatype in Isabelle/HOL...

How do I write a custom induction rule over a parameterized inductive set?...

Creating a datatype with inequalities in Isabelle...

Why can't I define nat in Isabelle?...

(Temporarily) disabling backtracking in Eisbach method...

Isabelle 2017: Support for proof method definitons seems to be lacking...

Access elements of data types...

Custom case distinctions in proofs...

How to do an inductive definition over "booleans" in Isabelle...

Isabelle: Exporting "sqrt" to Haskell...

How can I prove irreflexivity of an inductively defined relation in Isabelle?...

Can I use negated versions of arbitrary symbols in Isabelle?...

How we can access Coq or Isabelle/HOL using python program?...

Isabelle Type Error...