Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

Re: More /.{I->-1} craziness

• To: mathgroup at smc.vnet.net
• Subject: [mg106052] Re: [mg106017] More /.{I->-1} craziness
• From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
• Date: Thu, 31 Dec 2009 03:16:59 -0500 (EST)
• References: <200912300915.EAA17299@smc.vnet.net>

Hi,

just check the FullForm of the expressions and you'll see, that *none*
of the resulst are inconsistent.

Cheers
Patrick

On Wed, 2009-12-30 at 04:15 -0500, AES wrote:
> The more I play with these I->-I substitution rules, the more seemingly 
> wildly inconsistent results emerge.  For example:  
> 
>    In[1]:= -I/.I->-I
> 
>    Out[1]= -I
> 
>    In[3]:= -E/.E->-E
> 
>    Out[3]= << The Esc e e Esc symbol >>
> 
>    In[4]:= -Pi/.Pi->-Pi
> 
>    Out[4]= \[Pi]
> 
>    In[5]:= -Infinity/.Infinity->-Infinity
> 
>    Out[5]= -\[Infinity]
> 
> (In/Out[2] is removed because it was an irrelevant cell.)
> 

• References:
  • More /.{I->-1} craziness
    • From: AES <siegman@stanford.edu>