User blog comment:Mango523WNR/Question(GMT 10:2x Feb 11)/@comment-43798125-20200211134619/@comment-30279966-20200213120843

I don't think that Vista Function is illegal in mainspace just because it is based on another notation. For example, Aarex Function is in mainspace but it's a naive extension of Xi function. There is no problem with naive extensions though, just publish it somewhere else (for example, in Google Sites) and it should be fine, in my opinion.