teaching:topics:number:euler_number
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teaching:topics:number:euler_number [2020/09/12 12:55] simon |
teaching:topics:number:euler_number [2020/12/17 12:01] (current) simon |
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| Euler lived in the mid 1700s, the idea of a 'function' was being developed. \(\ {\rm e}^x\), \(\ \ln x\,\) and trigonometry considered as functions were being explored --- partly through the idea of power series. Taylor was before him, after Newton, the ideas of calculus were being refined and extended --- it was becoming both more rigorous and more general as many generations of mathematicians worked on it. Euler's Master of Philosophy dissertation, 1723 at age 16, compared the philosophies of Descartes and Newton. He introduced the notation \({\rm f}(x)\) and developed the power series for the exponential function ... | Euler lived in the mid 1700s, the idea of a 'function' was being developed. \(\ {\rm e}^x\), \(\ \ln x\,\) and trigonometry considered as functions were being explored --- partly through the idea of power series. Taylor was before him, after Newton, the ideas of calculus were being refined and extended --- it was becoming both more rigorous and more general as many generations of mathematicians worked on it. Euler's Master of Philosophy dissertation, 1723 at age 16, compared the philosophies of Descartes and Newton. He introduced the notation \({\rm f}(x)\) and developed the power series for the exponential function ... | ||
| \[\large{\rm e}^x=\sum_{n=0}^\infty\frac{x^n}{n!}\] | \[\large{\rm e}^x=\sum_{n=0}^\infty\frac{x^n}{n!}\] | ||
| - | Which, using the properties of \(\rm i\) along with the power series for `cos x` and `sin x`, gave the formula named after him. There are other approaches to that formula, and this combination of different ways to get there shows how deeply it crosses many areas of mathematics --- bringing algebra, trigonometry, geometry and number together as we embrace complex numbers as our underlying set of numbers. | + | Which, using the properties of \(\rm i\) along with the power series for `cos x` and `sin x`, gave the formula named after him. There are other approaches to that formula, and this combination of different ways to get there shows how deeply it crosses many areas of mathematics --- bringing algebra, trigonometry, geometry and number together when we embrace complex numbers as our underlying set of numbers. |
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| + | This notation, and some ideas around these infinite series, are discussed here: **=>[[teaching:topics:calculus:limits#limits]]** | ||
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| + | [[https://m.youtube.com/watch?v=-dhHrg-KbJ0|the mathologer]] talks of this using examples and patterns first, then [[https://m.youtube.com/watch?v=DoAbA6rXrwA|extends]] this | ||
teaching/topics/number/euler_number.1599879357.txt.gz · Last modified: 2020/09/12 12:55 by simon
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