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[parent] identity theorem of holomorphic functions (Theorem)

If the functions $ f$ and $ g$ are holomorphic in a domain $ D$ of the complex plane and the equation

$\displaystyle f(z) = g(z)$ (1)

is true in an infinite subset $ S$ of $ D$ having an accumulation point $ z_0$ in $ D$, then (1) is true in the whole $ D$.

Remark. The subset $ S$ may be e.g. some neighbourhood of $ z_0$ or some arc containing $ z_0$.



"identity theorem of holomorphic functions" is owned by rspuzio. [ full author list (2) | owner history (1) ]
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See Also: identity theorem of power series, identity theorem

Other names:  rigidity theorem for analytic functions

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proof of identity theorem of holomorphic functions (Proof) by rspuzio
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Cross-references: arc, neighbourhood, subset, accumulation point, infinite subset, equation, complex plane, domain, holomorphic, functions
There are 5 references to this entry.

This is version 8 of identity theorem of holomorphic functions, born on 2007-03-04, modified 2008-05-01.
Object id is 9016, canonical name is IdentityTheoremOfHolomorphicFunctions.
Accessed 1556 times total.

Classification:
AMS MSC30A99 (Functions of a complex variable :: General properties :: Miscellaneous)

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