English
Grade reversion is a linear map sending a product to its reverse; it is the canonical anti-automorphism of CliffordAlgebra Q.
Русский
Градационная реконструкция — линейное отображение, обращающее порядок умножения; это каноническая антиавтоморфизм клиффордовой алгебры.
LaTeX
$$$ \mathrm{reverse} : \mathrm{CliffordAlgebra}(Q) \to_{R} \mathrm{CliffordAlgebra}(Q). $$$
Lean4
/-- Grade reversion, inverting the multiplication order of basis vectors.
Also called *transpose* in some literature. -/
def reverse : CliffordAlgebra Q →ₗ[R] CliffordAlgebra Q :=
(opLinearEquiv R).symm.toLinearMap.comp reverseOp.toLinearMap