Re: Convolutive feature extraction (Searching for papers)

[Paris Smaragdis <paris@xxxxxxxxxxxxx>]

> You wrote in last sentence of discussion in this paper:
> Unfortunately, what makes non-negativity constraints so  
> successfully, in many
> domains, is still a subject under debate and investigation.
>
> Unfotunately. Really unfortunately? I would like to say  
> fortunately, instead.
> Perhaps you meanwhile got aware of my paper

Non-negativity makes sense when one casually talks about it, but it  
is a tricky notion to justify, and even more importantly analyze in  
mathematical terms.  So it is unfortunate that one can't express in  
equations why things work as well as they do.  If one isn't concerned  
with this particular pursuit then non-negativity can indeed be a very  
fortunate venture!

Paris