Series of LaguerreL problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg72785] Series of LaguerreL problem*From*: Arturas Acus <acus at itpa.lt>*Date*: Fri, 19 Jan 2007 02:09:38 -0500 (EST)

Dear Group, Using 5.2 version and looking at the help browser on LaguerreL[] function I see the following line In[1]:= Series[LaguerreL[n, z], {z, 0, 4}] Out[1]:= SeriesData[z, 0, {LaguerreL[n, 0], -LaguerreL[-1 + n, 1, 0], LaguerreL[-2 + n, 2, 0]/2, -LaguerreL[-3 + n, 3, 0]/6, LaguerreL[-4 + n, 4, 0]/24}, 0, 5, 1] Does it have any sense? Certainly, I can call FunctionExpand[] on the Normal[%] The behaviour of version 5.0 was different and I suspect bug here. Explanation/motivation or bug confirmation would be wellcome. -- Arturas Acus <acus at itpa.lt>