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		| @ -16,13 +16,12 @@ A \textit{space} over a field $\mathbb{F}$ consists of the following elements: | ||||
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| \textbf{Note:} | ||||
| The same symbols are used for additions and multiplications in both $\mathbb{F}$ and $V$. \\ | ||||
| Be careful, since \textit{these are different operations!} \\ | ||||
| Make sure you're aware of the context of each $+$ and $\times$ as you work through this handout. | ||||
| \textit{These are different operations}, so be aware of the context of each $+$ and $\times$. | ||||
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| \vspace{5mm} | ||||
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| Vector addition and multiplication must have the following properties. \\ | ||||
| Note that $x, y, z \in V$ and $a, b\in \mathbb{F}$. | ||||
| In both tables, $x, y, z \in V$ and $a, b\in \mathbb{F}$. | ||||
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| \vspace{2mm} | ||||
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| @ -52,13 +51,19 @@ Note that $x, y, z \in V$ and $a, b\in \mathbb{F}$. | ||||
| 		Closure			& \multicolumn{2}{c}{$ax \in V$} \\ | ||||
| 		Distributivity	& $a(x+y)~$&$~ax+ay$	\\ | ||||
| 						& $(a+b)x~$&$~ax+bx$	\\ | ||||
| 		Compatibility$^*$	& $(ab)x~$&$~x(ba)$		\\ | ||||
| 		Compatibility$^*$	& $(ab)x~$&$~a(bx)$		\\ | ||||
| 		Identity		& $a+0~$&$~a$ | ||||
| 	\end{tabular} | ||||
| \end{center} | ||||
| \end{minipage} | ||||
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| \vspace{5mm} | ||||
| \vspace{2mm} | ||||
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| $^*$ Remember that $a, b \in \mathbb{F}$ and $x \in V$. Thus, $(ab)$ is scalar multiplication and $(bx)$ is vector multiplication. \\ | ||||
| Compatibility is \textit{not} associativity, it is \say{compatibility of vector and scalar multiplication.} | ||||
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| \vfill | ||||
| \pagebreak | ||||
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| \definition{} | ||||
| There is a good chance you are familiar with basic vector arithmetic. \\ | ||||
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