Gauss-Legendre Quadrature coefficients

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SUMMARY

The discussion centers on obtaining the abscissas and weights for Gauss-Legendre Quadrature, specifically seeking a 32-point configuration but also accepting values between 30 to 50 points with 16 digits of accuracy. Chapter 25 of "Abramowitz and Stegun" provides the necessary formulas and numerical values, which can be accessed online. For Gaussian integration using Legendre polynomials, up to 96-point quadrature offers 24 digits of accuracy. This resource is essential for anyone needing precise numerical integration.

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  • Understanding of Gauss-Legendre Quadrature
  • Familiarity with numerical integration techniques
  • Knowledge of Legendre polynomials
  • Access to "Abramowitz and Stegun" reference material
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  • Research the derivation of Gauss-Legendre Quadrature coefficients
  • Explore numerical integration methods beyond Gauss-Legendre
  • Learn how to implement Gaussian integration in programming languages
  • Study the accuracy and error analysis of quadrature methods
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Mathematicians, engineers, and computer scientists involved in numerical analysis and integration, particularly those requiring high-precision calculations in their work.

Grozny
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When I was in college I found the abscissas and weights for a 32-point Gauss-Legendre Quadrature and wrote a program to do that. But I can't find that information now and need it again.

It doesn't have to be 32-point; anything from 30 to 50 would be fine, but 16 digits of accuracy please.
 
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Chapter 25 of Abramowitz and Stegun has what you want. An online edition can be found here:

http://www.convertit.com/Go/Convertit/Reference/AMS55.ASP?Res=100&Page=875

The text at the beginning of the chapter list formulas, and the tables at the end of the chapter provide numerical values of the abscissas and weights. For Gaussian integration based upon Legendre polynomials, you get 24 digits for up to 96-point quadrature. Enjoy.

jason
 
Thanks!

I can't wait to hurry home and start typing 96 24-digit numbers into my computer!
 

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