рус Programs
V.E. Adler. A Mathematica implementation of the generalized summation by parts algorithm. (2014)
  • Download:  (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).
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V.E. Adler / Last updated: March 25, 2015