An inductive predicate enumerating set elements...

Proving existence of an infinite path in Isabelle...

Proving associativity of sequential composition in Isabelle...

How to prove lemmas for mutually recursive types?...

How to prove that "3 is a prime" in the Isabelle proof assistant?...

How to prove elimination rules using Isar?...

I have Isabelle/HOL theory, how can I proceed with its application?...

Partial function in Coq / underdefined?...

Finite runs on a transition system...

Proving intuitive statements about THE in Isabelle...

Idiomatic calculus proofs in Isabelle...

Equivalence between apply and Isar styles in Isabelle...

Isabelle : complement of datatype...

How to use Isabelle's code_pred and values commands?...

Smart constructor pattern while proving with Isabelle...

Can erule produce erroneous subgoals?...

Proof implication with exist in the premises without using Isar...

Floating and interval arithmetic in Isabelle...

How to use different code lemmas for different modes of inductive predicate?...

How to define a semilattice of lists?...

How to test for falsity in implications?...

What is the correct approach to induct on list length?...

Proving properties of generated lists...

Constructing useful lemmas...

How to prove that a relation property holds for a transitive closure of this relation?...

How to fix "partially applied constant on left hand side of code equation"?...

Term equality in Isabelle...

How to define a function by restriction or extension of another function?...

Is it a good idea to extend standard types and operations?...

Proving implication (a --> c) from (b --> c) given relation between a and b...