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Computations for Bessel function for complex, real and partly 'mpfr' (arbitrary precision) numbers; notably interfacing TOMS 644; approximations for large arguments, experiments, etc.
Package details 


Author  Martin Maechler 
Maintainer  Martin Maechler <maechler@stat.math.ethz.ch> 
License  GPL (>= 2) 
Version  0.60 
URL  http://specfun.rforge.rproject.org/ 
Package repository  View on CRAN 
Installation 
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