Re: a old post again

*To*: mathgroup at smc.vnet.net*Subject*: [mg72760] Re: a old post again*From*: "dimitris" <dimmechan at yahoo.com>*Date*: Thu, 18 Jan 2007 05:42:23 -0500 (EST)*References*: <eol0fe$46m$1@smc.vnet.net>

I assume you mean that Integrate's result is wrong and NIntegrate's is right. Dimitris Ï/Ç Bhuvanesh Ýãñáøå: > Well, the old result was wrong :) > > In[1]:= $Version > > Out[1]= 5.0 for Linux (July 10, 2003) > > In[2]:= Integrate[(Log[a*x]/Sqrt[1 + x^2])*BesselJ[0, x], {x, 0, Infinity}] //InputForm > > Out[2]//InputForm= BesselI[0, 1/2]*BesselK[0, 1/2]*Log[a] > > In[3]:= N[% /. a->2] > > Out[3]= 0.681436 > > In[4]:= NIntegrate[(Log[a*x]/Sqrt[1 + x^2])*BesselJ[0, x] /. a->2, {x, 0, Infinity}, Method->Oscillatory] > > Out[4]= -0.316503 > > Bhuvanesh, > Wolfram Research.