Cannot access definition in HOL.Bit_Operations...

What is the difference between primrec and fun in Isabelle/HOL?...

Proof by reductio ad absurdum in Isabelle...

Locale inheritance after interpretation...

How to verify C functions with array parameters using Isabelle...

Is it possible to define a context for syntax rules?...

stuck on a proof (modeling IMP language)...

Sledgehammer output with vampire...

Complex set comprehension...

Can I define an "inductive" function on finite sets?...

Why this trivally incorrect lemma can be proved using sos?...

Isabelle Nitpick cardinality limit of 65536 exceeded; what to do?...

Termination proof in Isabelle...

Custom syntax for datatype constructor...

Is 1 / 0 = 0 according to Isabelle?...

Instantiate typeclass over type_synonym...

Recursive function leads to simplifier loop in Isabelle...

Isabelle: [simp] leading to an infinite loop...

How can I use a size parameter for datatype definitions...

Work backwards from goal in structured (isar) proof...

How to prove such a lemma that one hold and other holds, the concat of two still holds...

How to reuse type variables from locales...

How to have full control over substitution in Isabelle...

Isar: Failed to retrieve literal fact...

Isabelle multiply both sides of an equation (equational reasoning in Isar)...

What is `ind` type in Isabelle...

Bad number of arguments for type constructor in Isabelle/hol...

Function definition with one argument as index...

What is INF in Isabelle...

Topological filters in Isabelle...