V.E. Adler. A Mathematica implementation of the generalized summation by parts algorithm. (2014)
- Download:
psum.zip (readme.pdf, psum.nb, psum.m, examples.nb, tests.nb, Yamilov.nb)
- Last revised: 25 March 2015 (ver.1.2)
- Mathematica version: 5, works for 8
- Description:
An algorithm for solving of difference equations of the form
Tm(y) - ay = b
with variable coefficients, where T denotes the shift operator. Solvability
of such type of equations with respect to the coefficients of formal symmetry
(or formal recursion operator) provides a convenient integrability
test for evolutionary differential-difference equations
ut = f(u-m,...,um).
- Ref: http://arxiv.org/abs/1408.5726v1
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