Dear R-Users,
besselJ(pi/2, 0)
# 0.4720012
besselJ(pi/2, 1E-14)
# 0.4720012
besselJ(pi/2, 1E-15)
# 4.720012e+14
There seems to be an error in besselJ(pi/2, eps), where eps is close to 0;
although besselJ(pi/2, 0) is well behaved.
I am not an expert in the field - but it doesn't seem right.
Sincerely,
Leonard
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