Residual of an algebraic equation

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SUMMARY

The discussion focuses on solving a set of algebraic equations f(x,y)=0 and g(x,y)=0 using Newton iteration. Participants clarify the concept of 'residual' in this context, specifically distinguishing between the residual of the equations and the residuals of individual variables x and y. It is established that the residual of x or y refers to the components of the iteration's residual, rather than the overall residual of the equations themselves.

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  • Understanding of Newton iteration method
  • Familiarity with algebraic equations
  • Basic knowledge of residuals in numerical methods
  • Concept of scalar variables in mathematical equations
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  • Study the concept of residuals in numerical analysis
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Mathematicians, numerical analysts, and students studying iterative methods for solving algebraic equations.

feynman1
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To solve a set of equations f(x,y)=0, g(x,y)=0, where x, y, f, g are scalars, use Newton iteration. At each iteration step i, can certainly define the residual of this set of equations. But what's meant by the term 'residual of x' or 'residual of y'? Not the 'residual of the equations'?
 
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My guess would be take the residual of the iteration and look at the components separately.
 
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