I have a question regarding definition for matrix valued function. Suppose $f:\mathbb{R}^q \to \mathbb{R}^q \times \mathbb{R}^d$, which is a matrix valued function. Then what does it mean by $f$ is continuous differentiable? Where can I find reference for this kind of calculus material?
2026-04-08 17:04:37.1775667877
what does "matrix valued function is continuous differentiable" mean?
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