English
The matrix of conjAe in the basis {1, i} is the diagonal matrix diag(1, -1).
Русский
Матрица conjAe в базисе {1, i} равна диагональной матрице diag(1, -1).
LaTeX
$$$ \text{toMatrix}_{basisOneI,basisOneI}(conjAe\,\text{toLinearMap}) = \begin{pmatrix}1 & 0 \\ 0 & -1\end{pmatrix}. $$$
Lean4
/-- The matrix representation of `conjAe`. -/
@[simp]
theorem toMatrix_conjAe : LinearMap.toMatrix basisOneI basisOneI conjAe.toLinearMap = !![1, 0; 0, -1] :=
by
ext i j
fin_cases i <;> fin_cases j <;> simp [LinearMap.toMatrix_apply]