[Trilinos-Users] Shadow number reference

[Rhys Ulerich]

'Morning,

I have seen Michael Heroux give a talk where he suggest packing a
float and a double into a single C++ type, performing all computations
on both values, and then examining the difference to gauge truncation
errors.  Around me this has been called a "shadow number".  Does
anyone have a reference with where the idea originated?  I'm having no
luck digging for it.

Thanks,
Rhys