Khovanski's Theorem

If $f_1, \ldots, f_m:\Bbb{R}^n\to\Bbb{R}$ are exponential polynomials, then $\{x\in\Bbb{R}^n:f_1(x)=\cdots f_n(x)=0\}$ has finitely many connected components.

References

Marker, D. ``Model Theory and Exponentiation.'' Not. Amer. Math. Soc. 43, 753-759, 1996.