Power series of a scalar function with a vector

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SUMMARY

The discussion focuses on expanding a scalar function with a power series when the function accepts a vector argument. It concludes that if the scalar function is spherically symmetric, one can use the single-variable power series expansion based on the vector's magnitude. However, if the function is not solely dependent on the vector's magnitude, the multivariable power series expansion must be utilized. This distinction is crucial for accurate mathematical modeling.

PREREQUISITES
  • Understanding of scalar functions and their properties
  • Knowledge of power series expansions
  • Familiarity with multivariable calculus
  • Concept of spherically symmetric functions
NEXT STEPS
  • Study the principles of multivariable power series expansions
  • Explore the characteristics of spherically symmetric functions
  • Learn about the implications of vector arguments in scalar functions
  • Investigate examples of scalar functions that depend on vector magnitudes
USEFUL FOR

Mathematicians, physicists, and engineers dealing with scalar functions and vector analysis, particularly those involved in advanced calculus and mathematical modeling.

shehry1
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I was trying to expand a scalar function with a power series but it accepts a vector argument. Do I simply use the multivariable power series expansion with the components of the vector acting as the argument OR do I use the single variable power series and take the vector's magnitude in the expansion?
 
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You can only expand as a series in the vector's magnitude if the scalar function is only a function of the vector's magnitude (that's it's spherically symmetric). Is it? If not then you need the multivariable power series.
 

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