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Let $M : \mathbb{R}^2 \to \mathbb{R}^4$ be a differentiable function that takes a vector as an input and returns a matrix as the output (for instance the Jacobian of some two variables real function $f$). Is it possible to expand this function with a Taylor series in some way? I was thinking of something along the following lines.

\begin{equation} A(v) = A(v_0) + \langle DA(v_0),v-v_0 \rangle + R, \end{equation}

where $DA$ is some kind of operator that acts on vectors and returns a matrix and $R$ is the remainder.

marco trevi
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