LREtools
REcontent
content of a recurrence operator
REprimpart
primpart of a recurrence operator
Calling Sequence
Parameters
Description
Examples
REcontent(problem)
REprimpart(problem)
problem
-
REcontent returns the content of the shift operator (that is, INFO[shifteqn]), thus returning the greatest common divisor of the coefficients of the operator.
Similarly, REprimpart returns INFO[shifteqn]/REcontent(problem). Note: Whereas the sign is removed from the content, it is not removed from the primitive part.
withLREtools:
REcontentn+1un+2+n+1un,un,∅
n+1
REprimpartn+1un+2+n+1un,un,∅
&Shiftnu2+1
REcontentn+1un+2+n+2un,un,∅
1
REprimpartn+1un+2+n+2un,un,∅
&Shiftnu2n+&Shiftnu2+n+2
See Also
content
LREtools[REcreate]
RESol
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