I need some help with understanding this proof. I have 2 questions:
- What are those functions $f$,$g$? I mean what is the idea behind them?
- Why do we consider $f^{-1}(0)$ exactly? Where does this $0$ come from?
2026-03-25 12:54:22.1774443262
Proof that intersection of manifolds is submanifold
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