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appunti-steffo/9 - Algoritmi distribuiti/1 - Problemi/notazione o-piccola.md

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---
aliases:
- small-o
---
[[notazione asintotica]] per il [[limite inferiore]].
$$
\def \varAsym {{\color{royalblue} g(n)}}
\def \varFunc {{\color{orangered} f(n)}}
\def \varMore {{\color{palegreen} c_{more}}}
\def \varBeginning {{\color{turquoise} n_0}}
\Huge
o(\varAsym)
$$
In linguaggio formale, $\varFunc$ è in $O(\varAsym)$ se:
$$
o(\varAsym)
\Longleftrightarrow
\begin{cases}
\forall & \varMore > 0\\
\\
: & \begin{cases}
\exists & \varBeginning > 0\\
\forall & n \geq \varBeginning\\
: & 0 \leq \varFunc \leq (\varMore \cdot \varAsym)
\end{cases}
\end{cases}
$$