`KernelDiagram.kernelEqM?`🔗

Definition

Given an equality between kernels, return a string diagram of the LHS and RHS. Otherwise none.

def

KernelDiagram.kernelEqM? (e : Lean.Expr) :
  Lean.MetaM (Option ProofWidgets.Html)
KernelDiagram.kernelEqM? (e : Lean.Expr) :
  Lean.MetaM (Option ProofWidgets.Html)

Code

def kernelEqM? (e : Expr) : MetaM (Option Html) := do
  try
    let e ← unfoldKernelOp <| ← instantiateMVars e
    let (lifted_e, _) ← liftEquality e
    let some (_, lhs, rhs) := lifted_e.eq? | return none
    let some lhs ← KernelM? lhs | return none
    let some rhs ← KernelM? rhs | return none
    return some <| mkEqHtml lhs rhs
  catch _ => return none

Actions: Source · Open Issue

Meaning last changed in v4.34.0-rc2-1-g439785b (2026-08-23).

Self-contained, with its dependencies inlined and proofs replaced by sorry: download the raw file · open it in the Lean web editor.

Dependency graph

Audit surface: 19 project declarations, 289 external constants

✓ Proved: no sorry anywhere in its closure

This is the tool's own reading of one build's recorded axioms, and it is not robust against an author who wants it to pass. Checking meant to be relied on should go through Comparator, which replays the proof through the kernel from an export against an explicit list of permitted axioms.

KernelDiagram.kernelEqM?🔗

`KernelDiagram.kernelEqM?`🔗