Re: [boost] What does "ll" stand for?

From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2005-07-17 18:24:07

Daryle Walker wrote:
> This is for the "ll" function defined for quaternions and octonions.  The
> function returns the 1-norm of its argument.  Does anyone know what the "ll"
> name stands for?  I finally figured out that "sup" (the infinity-norm) most
> likely stands for "supremum".  (BTW, "abs" is the 2-norm.  The "norm"
> function isn't actually in this system, despite the name!)
> 

Hmmm... My guess from looking at the name 'll' would have been ll == length * 
length (frobenius norm), but it's not the 1-norm ;-(.

Regards,

Tobias