roblems. 2-36.* Let A CR be an open set and f: A → R a continuously differentiable 1-1 function such that det f'(x) = 0 Show that f(A) is an open set and f¹: f(A)→ A is differ- Show also that f(B) is open for any open set BCA. for all x. entiable.

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Problems. 2-36.* Let A CR" be an open set and f: A → R₁
a continuously differentiable 1-1 function such that det f'(x) ‡ 0
for all x.
Show that f(A) is an open set and f¹: f(A)→ A is differ-
entiable. Show also that f(B) is open for any open set BCA.
Transcribed Image Text:Problems. 2-36.* Let A CR" be an open set and f: A → R₁ a continuously differentiable 1-1 function such that det f'(x) ‡ 0 for all x. Show that f(A) is an open set and f¹: f(A)→ A is differ- entiable. Show also that f(B) is open for any open set BCA.
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