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A visual link between a tensor and its representation surface
Click and drag the representation ellipsoid to view the effect on the tensor describing it. The rotation matrix has a zero element since the rotations are somewhat restricted.
Tensor T

Rotation Matrix R

To change the principal values, use the keyboard arrow keys or write in the input boxes.
Values must be between 0.46 and 2500
Principal axes
T11 =
T22 =
T33 =
Ox 2 Ox 1 Ox 3