Received: by 10.66.79.6 with SMTP id f6mr9102963pax.3.1351480384407;
        Sun, 28 Oct 2012 20:13:04 -0700 (PDT)
Path: 6ni47225pbd.1!nntp.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!border3.nntp.dca.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nrc-news.nrc.ca!goblin1!goblin.stu.neva.ru!news2.arglkargh.de!feeder.erje.net!news-2.dfn.de!news.dfn.de!news.uni-stuttgart.de!news.cs.uni-magdeburg.de!not-for-mail
From: Paul <P...@noreply.com>
Newsgroups: comp.soft-sys.math.maple
Subject: Re: simple? transform/solve problem
Date: Thu, 25 Oct 2012 12:29:48 +0200
Organization: University of Magdeburg, Germany
Lines: 60
Message-ID: <k6b4as$h6a$1@fuerst.cs.uni-magdeburg.de>
References: <k65mt1$46c$1@fuerst.cs.uni-magdeburg.de> <18830e3c-64c5-44ef-b89d-90afe9ff4ddb@googlegroups.com>
NNTP-Posting-Host: imat46.mb.uni-magdeburg.de
Mime-Version: 1.0
X-Trace: fuerst.cs.uni-magdeburg.de 1351160988 17610 141.44.146.46 (25 Oct 2012 10:29:48 GMT)
X-Complaints-To: abuse@cs.uni-magdeburg.de
NNTP-Posting-Date: Thu, 25 Oct 2012 10:29:48 +0000 (UTC)
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1
In-Reply-To: <18830e3c-64c5-44ef-b89d-90afe9ff4ddb@googlegroups.com>
Bytes: 2309
X-Received-Bytes: 2357
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

 >> next problem I've:
 >>
 >>
 >>
 >>   > U(s) = (L*s+R)*Ii(s)
 >>
 >>
 >>
 >>     U(s) = (L*s+R)*Ii(s)            (4.4)
 >>
 >>
 >>
 >>   > (4.4)/( (U(s)*remove(has, rhs(4.4)), Ii(s)) )
 >>
 >>
 >>
 >>     1/(L*s+R) = Ii(s)/U(s)          (4.5)
 >>
 >>
 >>
 >> How can I transform it into
 >>
 >>
 >>
 >> (1/R) / (L/R*s + 1)
 >>
 >>
 >>
 >> normal(4.5) won't work. BTW, how is this named
 >>
 >> (the form a_n * s^n + ... + 1)?
 >>
 >>
 >>
 >> Thanks,
 >>
 >> Paul
 >
 >
 > restart:
 >
 > expr := 1/(L*s+R);
 >                                            1
 >                                 expr := -------
 >                                         L s + R
 >
 > T := coeff(denom(expr),s,0);
 >                                     T := R
 >
 >
 > 1/( T*expand(denom(expr)/T) );
 >                                        1
 >                                   -----------
 >                                     /L s    \
 >                                   R |--- + 1|
 >                                     \ R     /
 >
 >

thank you, so only a handcrafted way is possible ..