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Shifted Poirier-Reutenauer algebra corresponding to mixed insertion

초록/요약

In this thesis, we introduce a quotient algebra MPR of Malvenuto-Reutenauer algebra MR by using the mixed insertion algorithm due to Serrano. It may be viewed as a dual version of Shifted Poirier-Reutenauer algebra, which has been constructed by using Sagan-Worley insertion, in the sense that Serrano's mixed insertion is dual to Sagan-Worley insertion. Since it was shown by Jing and Li that NSym, the algebra of non-commutative symmetric functions, can be embedded into Malvenuto-Reutenauer algebra, we naturally obtain an algebra homomorphism from NSym to MPR. We also study the quotient of NSym by the kernel of this algebra homomorphism to demonstrate the relation between NSym and MPR.

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