[Trilinos-Users] Shadow number reference

Rhys Ulerich rhys.ulerich at gmail.com
Mon Apr 9 08:05:14 MDT 2012


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.


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