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lecture_1
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| lecture_1 [2015/01/21 15:54] – [More examples] rupert | lecture_1 [2016/01/22 19:13] (current) – old revision restored (2015/01/22 12:02) rupert | ||
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| - | ====== Chapter 1: Linear systems | + | ====== Chapter 1: Systems |
| ===== Linear equations ===== | ===== Linear equations ===== | ||
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| Consider the equation \[ 2x+5y=7.\] | Consider the equation \[ 2x+5y=7.\] | ||
| - | This is an equation in two //[[variable]]s//, or //[[indeterminate]]s//, $x$ and $y$. | + | This is an equation in two //[[variables]]//, or //[[indeterminates]]//, $x$ and $y$. |
| A [[solution]] of this equation is a pair of numbers $(a,b)\in \mathbb{R}^2$ so that if we replace $x$ with $a$ and replace $y$ with $b$, then the equation becomes true. | A [[solution]] of this equation is a pair of numbers $(a,b)\in \mathbb{R}^2$ so that if we replace $x$ with $a$ and replace $y$ with $b$, then the equation becomes true. | ||
lecture_1.1421855666.txt.gz · Last modified: by rupert