User blog comment:Moooosey/dco + decord sequence/@comment-35470197-20191009222350/@comment-35470197-20191010222723

@Syst3ms

Right. But it is good only for one who knows the FS for Veblen hierarchy. Since the OP honestly said that the OP misunderstood the FS of G_0, it is good to have others to check the correctness.

@Moooosey

Good, but there is a remaining problem. (I noticed the problem on the addition, but somehow I forgot to point out. Sorry about the careless pointing out.) The remaining problem is the non-uniqueness of the application of Rule 14. Please set additional appropriate contditions on a and b so that (a,b) can be unique from a+b.