API Reference > geometry-core > CartesianGeometry > Matrix3d > fastSymmetricEigenvalues fastSymmetricEigenvalues Method Factor this (symmetrized) as a product U * lambda * UT where U is orthogonal, lambda is diagonal. The upper triangle is mirrored to lower triangle to enforce symmetry. fastSymmetricEigenvalues(leftEigenvectors: Matrix3d, lambda: Vector3d): boolean Parameter Type Description leftEigenvectors Matrix3d lambda Vector3d Returns - boolean Defined in core/geometry/src/geometry3d/Matrix3d.ts Line 1141 Last Updated: 13 June, 2024