BesselY(n,x)
BesselY_n x
i1 : BesselY_0 .5 o1 = -.4445187335067066 o1 : RR (of precision 53)
i2 : BesselY_2 3p200 o2 = -.1604003934849237296757682995379809181040120401743782209819082 o2 : RR (of precision 200)
See Bessel function.
The object BesselY is a method function.