Problem 1. Suppose $F: \mathbb{R}^n \to \mathbb{R}^n$ is a differentiable bijection with $F^{-1}$ also differentiable. Prove that the derivative $F'(x)$ is invertible for all $x \in \mathbb{R}^n$.
Added by Richard O.
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Step 1
To prove that the derivative of F, denoted as DF, is invertible for all x in Rn, we need to show that DF is a square matrix and that it is invertible. Since F is a differentiable bijection, we know that it has an inverse function, denoted as F-1. This means Show moreβ¦
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