User blog comment:King2218/The Theta Function/@comment-5150073-20140325134424/@comment-24509095-20140326143112

I don't really know why I don't like the \(\psi\) function. It's probably because the definition in the wiki article is very confusing. But, I like \(\theta\) better because it grows faster than \(\psi\) below the BHO. And, personally, I think \(\theta\) looks easier.