User blog comment:Moooosey/Simple psi-- a fairly simple ocf/@comment-43798125-20191026225036/@comment-35470197-20191101234125

> And is psi(W) welldefined?

> I knew that psi_0(W) is welldefined

Then are you denoting other psi's by psi? It does not make sense. Please do not use confusing original abbreviations if you do not want others to answer what you are not intending to ask.