File: besselk.py

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mpmath 1.4.0~a6-1
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# Modified Bessel function of 2nd kind K_n(x) on the real line for n=0,1,2,3
k0 = lambda x: besselk(0,x)
k1 = lambda x: besselk(1,x)
k2 = lambda x: besselk(2,x)
k3 = lambda x: besselk(3,x)
plot([k0,k1,k2,k3],[0,8],[0,5])