How to calculate the order of an infinitesimal

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SUMMARY

This discussion focuses on determining the order of an infinitesimal in calculus, specifically how to identify second-order or higher infinitesimals. The participant describes a method for first-order infinitesimals using the equation \(\frac{\delta y}{\delta x}=\frac{dy}{dx}+\epsilon\approx\frac{dy}{dx}\delta x\). The conversation emphasizes that the order of an infinitesimal is always relative, prompting questions about the basis for this relativity and the methods to ascertain higher orders. The need for clarity in typesetting with LaTeX is also noted as a future update.

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  • Understanding of calculus concepts, particularly derivatives.
  • Familiarity with infinitesimals and their properties.
  • Basic knowledge of LaTeX for mathematical typesetting.
  • Experience with mathematical notation and limits.
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  • Research the concept of higher-order infinitesimals in non-standard analysis.
  • Study the application of Taylor series for approximating functions.
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Mathematicians, calculus students, and educators seeking to deepen their understanding of infinitesimals and their orders in mathematical analysis.

NBagley119
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I know how to find out if an infinitesimal delta is of the first order (if delta*y/delta*x=dy/dx+epsilon is approximately equal to (dy/dx)*delta*x, but how do you find out if an infinitesimal is of second order or higher and how do you find out what that order is?

Note: I will update this question with typesetting once I figure out how to use LaTeX.
 
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The order of an 'infinitesimal' is always relative.
 
Eynstone said:
The order of an 'infinitesimal' is always relative.

Relative to what? And how do you find the order?
 
I know how to find out if an infinitesimal delta is of the first order (if \frac{\delta y}{\delta x}=\frac{dy}{dx}+\epsilon\approx\frac{dy}{dx}\deltax, but how do you find out if an infinitesimal is of second order or higher and how do you find out what that order is?
 

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