Specifying direction of rule in Isabelle/HOL...

Why do I have to use "numeral_nat" or "numeral.simps" when proving a simple comp...

Meta symbol for existential quantification in Isabelle...

Proving basic properties of recursive "less than" definition for naturals in Isabelle...

Referencing current assumptions in Isabelle...

Accumulating results while using them in Isabelle/Isar...

Isabelle "Failed to apply proof method" when working with two theory files...

How to use the base case assumption when proving with 'induct' in Isabelle...

An example of pratical application of Isabelle/HOL...

How to find the proof method chosen by the "proof" command...

What does "case _ of _" mean in Isabelle...

Recursion in a lambda expression...

Introducing fixed representation for a quotient type in Isabelle...

How to prove the existence of inverse functions in Isabelle/HOL?...

Is function declaration a term of type Constant and how to cast such function declaration to Const c...

How to define a function/map from one set to another (f: A -> B) in Isabelle?...

How to use obtain in existential proofs?...

How to make find_theorems more specific...

How to write subscripts in Isabelle?...

Quantifying over a specific part of the sentence in Isabelle...

Can Isabelle lemma be used for stating fact about definition?...

Function termination/completeness on Isabelle...

Checking datatypes in Isabelle...

Focusing on a subgoal...

How to prove by case analysis on a logical condition being either true or false in Isabelle/HOL?...

Isabelle termination of function on datatypes containing maps to themselves...

How to see all the active Isabelle sessions?...

How to register MMT as Isabelle component on Windows 10 (to call isabelle mmt_build)?...

How to execute Isabelle 2021 commandline commands from Windows 10?...

Isabelle: No code equations for the function...