Abstract
Operated algebras, that is, algebras equipped with linear operators, have important applications in mathematics and physics. Two primary instances of operated algebras are the Rota–Baxter algebra and TD-algebra. In this paper, we introduce a [Formula: see text]-TD algebra that includes both the Rota–Baxter algebra and the TD-algebra. The explicit construction of free commutative [Formula: see text]-TD algebra on a commutative algebra is obtained by a generalized shuffle product, called the [Formula: see text]-TD shuffle product. We then show that the free commutative [Formula: see text]-TD algebra possesses a left counital bialgebra structure by means of a suitable 1-cocycle condition. Furthermore, the classical result that every connected filtered bialgebra is a Hopf algebra, is extended to the context of left counital bialgebras. Given this result, we finally prove that the left counital bialgebra on the free commutative [Formula: see text]-TD algebra is connected and filtered, and thus is a left counital Hopf algebra.
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