Add comment about the origin of the failing 3x3 SVD matrix
@@ -364,6 +364,9 @@ fn svd_fail() {
#[test]
#[rustfmt::skip]
fn svd3_fail() {
+ // NOTE: this matrix fails the special case done for 3x3 SVDs.
+ // It was found on an actual application using SVD as part of the minimization of a
+ // quadratic error function.
let m = nalgebra::matrix![
0.0, 1.0, 0.0;
0.0, 1.7320508075688772, 0.0;
