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The triangle inequality.

Theorem 14.1.1   \fbox{$\forall \overrightarrow{x},\overrightarrow{y} \in V, \quad
\begin{Vmatri...
...tarrow{x} \end{Vmatrix} \cdot \begin{Vmatrix}\overrightarrow{y} \end{Vmatrix}$ }.


\begin{proof}.
\par\begin{tabular}{clll}
&\underline{$\begin{Vmatrix}\overright...
...trix}+\begin{Vmatrix}\overrightarrow{y}\end{Vmatrix}$\end{center}\par\end{proof}


  
Figure 1:
\begin{figure}
\centering
\mbox{\epsfig{file=vectorsum.eps,height=7cm} }
\end{figure}



Noah Dana-Picard
2001-02-26
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