Fortran Programs for the Calculation of Wigner 3j, 6j, and 9j Coefficients for Angular Momenta <= 80 (Classic Reprint) - Softcover

Inhaltsangabe

Compute Wigner 3j, 6j, and 9j coefficients with Fortran programs designed for angular momenta up to 80.

This reference presents Fortran II and Fortran IV programs that calculate these coefficients. It explains how large factorials are handled by using logarithms and how the alternating series are summed in double precision. The material covers two program versions: Version I emphasizes speed and lower memory use, while Version II offers higher accuracy with deeper internal precision.

- Learn how the methods produce 3j, 6j, and 9j values across a wide range of inputs
- Understand the tradeoffs between speed, memory use, and numerical accuracy
- See sample input structures, program listings, and testing approaches
- Discover how single- and double-precision implementations compare in practice

Ideal for readers who work with quantum angular momentum calculations and want practical, reusable Fortran tools.

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