An anonymous reader writes "The Ivy Bridge graphics processor from Intel is now fully documented under the Creative Commons. Intel released four volumes of documents (2400+ pages) covering their latest graphics core as a complete programming guide with register specifications. Included with the graphics documentation is their new execution unit and video engine."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"