Galois matrices, the subject of the previous post,
are of course not new. See, for instance, Steinberg in 1951:
The American Mathematical Society reports that Steinberg died
on May 25, 2014.
As the above 1951 paper indicates, Steinberg was well acquainted with
what Weyl called "the devil of abstract algebra." In this journal, however,
Steinberg himself appears rather as an angel of geometry.
