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Re: Symbolize

• To: mathgroup at smc.vnet.net
• Subject: [mg31747] Re: Symbolize
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Sat, 1 Dec 2001 02:43:34 -0500 (EST)
• Organization: Universitaet Leipzig
• References: <9u4gs8$lpd$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

only for your last question, I is a *number* Complex[0,1] and
Collect[] work only for symbols/patterns but

x + I y + I a + b //. a_*I + b_*I :> (a + b)*I

work as expected.

Regards
  Jens

Blimbaum Jerry DLPC wrote:
> 
>         For some reason the Symbolize command in the Notations Package
> duzznt work....I have version 4.1 Mathematica with Windows 2000...has anyone
> else experienced this problem?   I have removed Mathematica many times over
> and reloaded it but still get the same problem...so for example, if i want
> to symbolize subscripted variables and then ask for their Head I still get
> the output  Subscript rather then symbol...is there anything that I can do
> to track this problem down?   I also have Matlab on my machine and wonder
> whether there's some kind of conflict in reading  .m files...
>         Another question:   why duzz the following not work , i.e. give me
> x + b + (a + y) I     rather then just returning the original
> expression....I realize that it can be dunn using ComplexExpand and that's
> what i ended up using but i was surprised that Collect didnt work...
> 
>         Collect[x + I y + I a + b, I]   where I is the imaginary symbol....
> 
>         thanks     Jerry Blimbaum    NSWC   Panama City, Fl