Re: Error in integrals?
- To: mathgroup at smc.vnet.net
- Subject: [mg9502] Re: Error in integrals?
- From: sergio at scisun.sci.ccny.cuny.edu (Sergio Rojas)
- Date: Sat, 8 Nov 1997 23:04:33 -0500
- Organization: City College Of New York - Science
- Sender: owner-wri-mathgroup at wolfram.com
Hello:
I tried your example in Mathematica 2.2:
In[12]:= In[12]:= N[Integrate[ior[m],{m,0,1}]]
General::intinit: Loading integration packages -- please wait.
Out[12]= 1.73206
In[13]:= NIntegrate[ior[m],{m,0,1}]
Out[13]= 1.73206
In[14]:= In[14]:= $Version
Out[14]= DEC OSF/1 Alpha 2.2 (September 9, 1994)
Have fun
Sergio
In article <63rv7q$lqd at smc.vnet.net> you wrote:
: Mathematica 3.0 on a PowerMac 7200/90 88MB Mac OS 8 gives different
: results for Integrate vs. NIntegrate.
: Here is one example.
: ior[m_] := 1/3*(2*Sqrt[3]*Sqrt[(-1 + m^2)^2/(1 + m^2)^4] +
: Sqrt[(Sqrt[3] - 6*m - Sqrt[3]*m^2)^2/(1 + m^2)^4] + Sqrt[(Sqrt[3] +
: 6*m - Sqrt[3]*m^2)^2/(1 + m^2)^4])
: In[31]:=
: N[Integrate[ior[m],{m,0,1}]]
: Out[31]=
: -0.42265
: In[32]:=
: NIntegrate[ior[m],{m,0,1}]
: Out[32]=
: 1.73206
: What am I doing wrong ? Which answer is correct ?
: Cliff Nelson