Usuário(a):Usien

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\left[ \mathbf{J}^{\vec F}_{\vec x} \right]_{ij} = D_j \vec F_i = \frac{\partial \vec F_i}{\partial \vec x_j}
\left[ \mathbf{H}^{f}_{\vec x} \right]_{ij} = D_i D_j f = \frac{\partial^2 f}{\partial \vec x_i \partial \vec x_j}
\mathbf{\hat e_\alpha} = \mathrm{U} \!\left( \frac{\partial \vec x}{\partial \alpha} \right)

\partial y = \eth \delta y

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