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2010 Mathematics Subject Classification: 16R10, 17B01.
Let M2(K) be the algebra of 2×2 matrices over an infinite integral domain K. In this note we describe a basis for the Z2-graded identities of the pair (M2(K),gl2(K)).
∗ Partially supported by CNPq (Grant 304003/2011-5) and FAPESP (Grant 2010/50347-9).
∗∗ Partially supported by CNPq, DPP/UnB and by CNPq-FAPDF PRONEX grant 2009/00091-0 (193.000.580/2009).
2010 Mathematics Subject Classification: 16R10, 16R99, 16W50.
Let K be an infinite field and let M2(K) be the matrix algebra of
order two over K. The polynomial identities of M2(K) are known whenever
the characteristic of K is different from 2. The algebra M2(K) admits a
natural grading by the cyclic group of order 2; the graded identities for
this grading are known as well. But M2(K) admits other gradings that
depend on the field and on its characteristic. Here we describe the graded
identities...
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