Definition:Asymptotic Equality/General Definition/Point
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Definition
Let $T = \struct {S, \tau}$ be a topological space.
Let $V$ be a normed vector space over $\R$ or $\C$ with norm $\norm {\, \cdot \,}$.
Let $f, g: S \to V$ be mappings.
Let $x_0 \in X$.
Then:
- $f$ is asymptotically equal to $g$ as $x \to x_0$
- $f - g = \map \oo g$ as $x \to x_0$
where $\oo$ denotes little-$\oo$ notation.