= Anisotropic alpha-squared dynamo
{title2=$\partial_t\mathbf B=\nabla\times(\boldsymbol\alpha\mathbf B)+\eta\nabla^2\mathbf B$}
An <alpha-squared dynamo> may use a tensorial <alpha effect> rather than an isotropic coefficient. For constant <alpha tensor> $\boldsymbol\alpha$ and <magnetic diffusivity> $\eta>0$, a steady nonzero <Fourier mode> with wavevector $\mathbf K$ satisfies $\eta K^2\mathbf B=i\mathbf K\times(\boldsymbol\alpha\mathbf B)$ and $\mathbf K\cdot\mathbf B=0$. Anisotropy can change both the critical alpha magnitude and the preferred wavevector direction.
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