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math.RA2026
On cyclic invariants of the free associative algebra
Silvia Boumova, Vesselin Drensky
Let be the free associative algebra of rank over a field . Lane in 1976 and Kharchenko in 1978 proved that the algebra of invariants $K\langle X…
math.RA2026
On dihedral invariants of the free associative algebra of rank two
Silvia Boumova, Vesselin Drensky, Şehmus Fındık
Let denote the free associative algebra of rank over a field . By results of Lane (1976) and Kharchenko (1978), the algebra of invariants $K\lan…