associated with the paper Invariant deformation theory of affine schemes with reductive group action
Here are two text files containing Macaulay 2 code, which we used in the article Invariant deformation theory of affine schemes with reductive group action (joint work with Christian Lehn). Our main reference was the book Computational Invariant Theory
by H. Derksen and G. Kemper. The routines are far from optimal,
improving them is work in progress. Feel free to comment or ask
The program used in what was called situation 1 in our paper, that is, GL_3: prog_GL3.txt
The program used in what was called situations 2 and 3 in our paper, that is, prog_SO3_und_O3.txt
A detailed documentation will be coming up (hopefully) sooner or later.