Services & ResourcesWolfram ForumsMathGroup Archive

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

Factorising operators??

• To: mathgroup at smc.vnet.net
• Subject: [mg30959] Factorising operators??
• From: Mat Bowen <m.k.bowen at lboro.ac.uk>
• Date: Fri, 28 Sep 2001 03:55:08 -0400 (EDT)
• Organization: Loughborough University, UK
• Sender: owner-wri-mathgroup at wolfram.com

Hello,

I'm new to mathematica and looking for help with the following:

I have two operators, a and b, that function as approximations to first and
second order derivatives. I can write (a+b)[x] and then use Through[%,Plus]
to generate a[x]+b[x] but I want to do the reverse, ie. Get mathematica to
output (a+b)[x] if I give it a[x]+b[x]. Is there any way (preferably simple)
to do this which will also work with more general cases ie. a[x]+5b[x]+const
c[x] should produce (a+5b+const)[x]

Thanks,
Mat Bowen

• Follow-Ups:
  • Re: Factorising operators??
    • From: Tomas Garza <tgarza01@prodigy.net.mx>