Hello, it seems that the derivatives of bessel_K have the wrong sign: sage: [Bessel(i, 'K')(x).diff(x) for i in range(5)] [1/2*bessel_K(1, x) + 1/2*bessel_K(-1, x), 1/2*bessel_K(2, x) + 1/2*bessel_K(0, x), 1/2*bessel_K(3, x) + 1/2*bessel_K(1, x), 1/2*bessel_K(4, x) + 1/2*bessel_K(2, x), 1/2*bessel_K(5, x) + 1/2*bessel_K(3, x)]
on: Sage Version 6.1.1, Release Date: 2014-02-04 CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ OS: Ubuntu 12.04.5 LTS For type J, Y and I Bessel functions the derivatives appear to be right. Best regards, Roman. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
