germs equivalences finite order real-analytic submanifolds
Zaitsev, D., Formal and finite order equivalences, Mathematische Zeitschrift, 169, 3-4, 2011, 687-696
Mathematische Zeitschrift 169 3-4
We show that two families of germs of real-analytic subsets in Cn are formally equivalent if and only if they are equivalent of any finite order. We further apply the same technique to obtain analogous statements for equivalences of real-analytic self-maps and vector fields under conjugations. On the other hand, we provide an example of two sets of germs of smooth curves that are equivalent of any finite order but not formally equivalent.
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