Reordering goals (Isabelle)...

How do I refer to the current subgoal in Isar?...

Proof by induction with three base cases (Isabelle)...

Limit of c^n (with ¦c¦<1) is 0 (Isabelle)...

Usage of "also have...finally have" in Isabelle...

Why won't the 'linordered_field_class.frac_le' rule work? (Isabelle)...

Intro rule for "∀r>0" in Isabelle...

proof (rule disjE) for nested disjunction...

Sledgehammer gives insufficient proof tactic...

Isabelle / isar: Implementing equational reasoning...

Proving a simple arithmetic statement with rewriting in Isabelle...

Create a quotient-lifted type with polymorphism over working set and equivalence relation in Isabell...

Proof assistant for mathematics only...

Skip a subgoal while proving in Isabelle...

completely replace the inner syntax in isar?...

Defining disjoint union of different types in Isabelle and more...

How to define Subtypes in Isabelle and what they mean?...

Untyped set operations in Isabelle...

How type casting is possible in isabelle...

Printing out / showing detailed steps of proof methods (like simp) in a proof in isabelle...

Factoring out a lemma premise as a definition causes failure in proof method (auto) application in i...

Organizing constraints in isabelle in order to model a system...

Can I "map" an "OF" over a list of lemmas...

Case names for locale interpretation...

Taming meta implication in Isar proofs...

What can one assume, what is worth assuming in Isar?...

How to streamline a proof of a function property on a datatype?...

Isabelle: Switching between "structured" and "apply-style" proofs...

How to make the assumption of the second case of an Isabelle/Isar proof by cases explicit right in p...

When would you use `presume` in an Isar proof?...