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Vadim Kosoy edited We_note_a_few_simple__.tex
about 8 years ago
Commit id: 068810acda617f77dffb49992528f2f31e9ca1a6
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...
We note a few simple properties of error spaces which will be useful in the following.
\begin{proposition}
\label{prp:err_spc_zero}
For any error space $\mathcal{E}$, $0 \in \mathcal{E}$.
...
Follows from conditions (ii) and (iii), since $0 \leq 2^{-h}$.
\end{proof}
\begin{proposition}
For any error space $\mathcal{E}$, $\varepsilon \in \mathcal{E}$ and $c \in \Reals^{\geq 0}$, $c \varepsilon \in \mathcal{E}$.
\end{proposition}
\begin{proof}
For $c = 0$, it follows from proposition~$\ref{prp:err_spc_zero}$. For $c > 0$, it follows from condition (i).
\end{proof}