y2 + (μ1x2 + μ3) y = x5 + μ2x4 +μ4x3 + μ6x2 + μ8x + μ10
This file contains all the relations satisfied by the 4-index Pijkl functions, the bilinear relations satisfied by the 2- and 3-index Pij, Pijk functions, and all the quadratic relations satisfied by the 3-index Pijk functions. These are written in Maple format in an obvious notation.
The following file contains the terms of the expansion of the σ function up to terms of Sato weight 15: Ci.txt .