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MathGroup Archive 2006

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Re: Limit bug?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65911] Re: [mg65904] Limit bug?
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Sun, 23 Apr 2006 06:17:11 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

I don't know why the second form does not evaluate but you can force it with 
TrigToExp

Limit[TrigToExp[x - Log[Cosh[x]]], x->Infinity]

log(2)


Bob Hanlon

> 
> From: "Ray Koopman" <koopman at sfu.ca>
To: mathgroup at smc.vnet.net
> Subject: [mg65911] [mg65904] Limit bug?
> 
> Does anyone have an explanation for this?
> I was expecting Out[2] to be Log[2].
> 
> In[1]:= Limit[ Log[Cosh[x]] - x, x -> Infinity]
> 
> Out[1]= -Log[2]
> 
> In[2]:= Limit[ x - Log[Cosh[x]], x -> Infinity]
> 
> Out[2]= Limit[x-Log[Cosh[x]],x\[Rule]\[Infinity]]
> 
> 


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