Add successful rref case and its failing counterpart

The matrix with the bigger magnitude passes, the same matrix scaled by its largest eigenvalue fails. Yet they should have the same rref.

Author: Aweptimum

tests/LinearAlgebra/Reduction/ReducedRowEchelonFormTest.php

@@ -1045,6 +1045,44 @@ public function dataProviderForRref(): array
                     [0, 0, 0, 0, 0],
                 ],
             ],
+            // Large magnitude case
+            [
+                [
+                    [-2.82878905765*10**6, 0, 0, 0, 0, 0],
+                    [0, -2.82878905765*10**6, 0, 0, 0, 1729.7],
+                    [0, 0, -2.82878905765*10**6, 0, -1729.7, 0],
+                    [0, 0, 0, -2.82879105765*10**6, 0, 0],
+                    [0, 0, -1729.7, 0, -1.05765, 0],
+                    [0, 1729.7, 0, 0, 0, -1.05765]
+                ],
+                [
+                    [1, 0, 0, 0, 0, 0],
+                    [0, 1, 0, 0, 0, 0],
+                    [0, 0, 1, 0, 0, 0],
+                    [0, 0, 0, 1, 0, 0],
+                    [0, 0, 0, 0, 1, 0],
+                    [0, 0, 0, 0, 0, 1]
+                ]
+            ],
+            // Scaled version of large magnitude case
+            [
+                [
+                    [-0.99999966687087, 0, 0, 0, 0, 0],
+                    [0, -0.99999966687087, 0, 0, 0, 0.00061146285160793],
+                    [0, 0, -0.99999966687087, 0, -0.00061146285160793, 0],
+                    [0, 0, 0, -1.0000003738869, 0, 0],
+                    [0, 0, -0.00061146285160793, 0, -3.7388694340557*10**-7, 0],
+                    [0, 0.00061146285160793, 0, 0, 0, -3.7388694340557*10**-7]
+                ],
+                [
+                    [1, 0, 0, 0, 0, 0],
+                    [0, 1, 0, 0, 0, 0],
+                    [0, 0, 1, 0, 0, 0],
+                    [0, 0, 0, 1, 0, 0],
+                    [0, 0, 0, 0, 1, 0],
+                    [0, 0, 0, 0, 0, 1]
+                ]
+            ]
         ];
     }