a body has the symmetry that its shape is unchanged by arbitrary rotations around axis, e_3, Show that any second-rank tensor calculated for the body will take the form: 3*3 matrix: a b 0 -b a 0 0 0 c
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There is Euler's theorem, that says that a rotation around an axis is given by a matrix of the form , where the matrix is a rotation of the plane.
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