Abstract
We derive closed recursion equations for the symmetric polynomials occurring in the form factors of D n (1) affine Toda field theories. These equations follow from kinematical and bound state residue equations for the full form factor. We also discuss the equations arising from second- and third-order forward channel poles of the S-matrix. The highly symmetric case of D 4 (1) form factors is treated in detail. We calculate explicitly cases with a few particles involved.
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