Let H be a normal subgroup of G. Then the group algebra A = FG can be naturally graded by G/H where the homogeneous components are cosets. We prove that if A satisfies a G/H-graded identity than it also satisfies an ordinary polynomial identity under the assumption that [G : H] is finite.
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Technion Israel Inst Technol, Dept Math, IL-32000 Haifa, Israel
Technion Guangdong Israel Inst Technol, Shantou, Guangdong, Peoples R ChinaTechnion Israel Inst Technol, Dept Math, IL-32000 Haifa, Israel
Aljadeff, Eli
Haile, Darrell
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Indiana Univ, Dept Math, Bloomington, IN 47405 USATechnion Israel Inst Technol, Dept Math, IL-32000 Haifa, Israel
Haile, Darrell
Karasik, Yaakov
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Justus Liebig Univ Giessen, Math Inst, Giessen, GermanyTechnion Israel Inst Technol, Dept Math, IL-32000 Haifa, Israel