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Real-valued functions of real variable, analytic properties of functions and sequences, limits, continuity, smoothness of these.

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Projection of a real analytic manifold onto subspace is union of real analytic submanifolds

Let $M$ be a compact connected real analytic submanifold of the Euclidean space $\mathbb{R}^{n} \times \mathbb{R}$ and denote by $\pi : \mathbb{R}^{n} \times \mathbb{R} \rightarrow \mathbb{R}^{n}$ the …