2016
DOI: 10.1016/j.jsc.2015.11.007
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Dual bases for noncommutative symmetric and quasi-symmetric functions via monoidal factorization

Abstract: Abstract. In this work, an effective construction, via Schützenberger's monoidal factorization, of dual bases for the non commutative symmetric and quasi-symmetric functions is proposed.

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Cited by 4 publications
(7 citation statements)
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“…where A rat fin Y = ∪ F⊂ f inite Y A rat F , the algebra of series over finite subalphabets 30 . (ii) (Kronecker's theorem [1,51]) One has A rat x = {P(1 − xQ) −1 } P,Q∈A[x] (for x ∈ X ) and if A = K is an algebraically closed field of characteristic zero one 30 The last inclusion is strict as shows the example of the following identity [6] (ty also has K rat x = span K {(ax) * ⊔⊔ K x |a ∈ K}. (iii) The rational series (∑ x∈X α x x) * are conc-characters and any conccharacter is of this form.…”
Section: Syntactically Exchangeable Rational Seriesmentioning
confidence: 99%
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“…where A rat fin Y = ∪ F⊂ f inite Y A rat F , the algebra of series over finite subalphabets 30 . (ii) (Kronecker's theorem [1,51]) One has A rat x = {P(1 − xQ) −1 } P,Q∈A[x] (for x ∈ X ) and if A = K is an algebraically closed field of characteristic zero one 30 The last inclusion is strict as shows the example of the following identity [6] (ty also has K rat x = span K {(ax) * ⊔⊔ K x |a ∈ K}. (iii) The rational series (∑ x∈X α x x) * are conc-characters and any conccharacter is of this form.…”
Section: Syntactically Exchangeable Rational Seriesmentioning
confidence: 99%
“…It culminates with the fact that the coefficients of any suitable 5 solution is group-like, i.e. satisfies 6 , for any u, v ∈ X * and x i ∈ X ,…”
Section: Introductionmentioning
confidence: 99%
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“…Let X denotes either the alphabets X := {x 0 , x 1 } or Y := {y k } k≥1 and X * denotes the monoid freely generated by X (its unit is denoted by 1 X * ). In the sequel, we will consider, for any commutative ring A, the Hopf algebras (A X , conc, ∆ ⊔⊔ , 1 X * , ǫ) and (A Y , conc, ∆ , 1 Y * , ǫ) 5 Once equipped with a total ordering <, (X , <) a totally ordered alphabet for which, we can consider LynX ⊂ X * , its set of Lyndon words [21] and {P l } l∈LynX the basis of Lie C X with which the PBW-Lyndon basis {P w } w∈X * of noncommutative polynomials (A X , conc, 1 X * ) is constructed. Its graded dual basis is denoted by {S w } w∈X * , containing the pure transcendence basis {S l } l∈LynX of the shuffle algebra (A X , ⊔⊔ , 1 X * )) [24].…”
Section: Combinatorial Frameworkmentioning
confidence: 99%
“…> . (2.5)4 Here, e denotes the counit defined by e( ) = ⟨ | 1 * ⟩ (for any ∈ ⟨ ⟩) 5. The dual family, i.e.…”
mentioning
confidence: 99%