catchy phrase for this idiom?

[BCS]

Hello Bill,

> Kinda not the same thing if you ask me.  Eigen-blah generally refers
> to something where you've captured the essence of something better by
> representing it using a different set of basis functions.
> 
> This doesn't seem to have much of anything to do with that.  Its just
> identity or sameness of name.  That's not really what eigen thingys
> are about.
> 

An Eigen value for a matrix M is a vector V sutch that M x V = V (IIRC)