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MathGroup Archive 1995

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Question about diff. operators

  • To: mathgroup at christensen.cybernetics.net
  • Subject: [mg1951] Question about diff. operators
  • From: Peter Meuris <peterm at plasma.oma.be>
  • Date: Sat, 26 Aug 1995 00:09:46 -0400
  • Organization: BIRA


Hello,

I have a problem with the use of pure operators. I would like to 
calculate P L - L P with

d=(D[#,x]&)

and

L=d[d] + u[x]
P=d[d] + 6 u[x] d + 3 u'[x]

How is this possible, and how can i get the result 
[PL-LP][u[x]]

Thanks in advance

--------------------------------------------------------------------------------
Peter MEURIS
Belgian Institute for space aeronomy
Ringlaan 3
1180 BRUSSEL
BELGIUM
phone : +32.2.373.04.18
fax   : +32.2.374.84.23
E-mail: peterm at plasma.oma.be
wtalk : peter at iaspc8.oma.be
URL   : http://www.oma.be/BIRA-IASB/Welcome.html
--------------------------------------------------------------------------------




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