`BookProof.ChapterEulerDensityMatrix.density_collapse` (t : ℝ) : densityMatrix t - (Real.sin (2 * t)) • (Zdiag * Jdens) = !![Real.cos t ^ 2, 0; 0, Real.sin t ^ 2]

Initializing...

`BookProof.ChapterEulerDensityMatrix.density_collapse` (t : ℝ) : densityMatrix t - (Real.sin (2 * t)) • (Zdiag * Jdens) = !![Real.cos t ^ 2, 0; 0, Real.sin t ^ 2] · Prove2Me