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Cofree compositions of coalgebras (extended abstract)
Combinatorics · Submitted 18 Nov 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We prove that the composition of two cofree coalgebras is cofree and give conditions which imply that the composition is a one-sided Hopf algebra.
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The abstract, sentence by sentence
We develop the notion of the composition of two coalgebras, which arises naturally in higher category theory and the theory of species. We prove that the composition of two cofree coalgebras is cofree and give conditions which imply that the composition is a one-sided Hopf algebra. These conditions hold when one coalgebra is a graded Hopf operad D and the other is a connected graded coalgebra with coalgebra map to D. We conclude by discussing these structures for compositions with bases the vertices of multiplihedra, composihedra, and hypercubes.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We develop the notion of the composition of two coalgebras, which arises naturally in higher category theory and the theory of species. | contribution 0.97 | 0.92 | 0.04 | asserted 1.00 |
| s1 | We prove that the composition of two cofree coalgebras is cofree and give conditions which imply that the composition is a one-sided Hopf algebra. | result 0.97 | 0.96 | 0.73 | asserted 1.00 |
| s2 | These conditions hold when one coalgebra is a graded Hopf operad D and the other is a connected graded coalgebra with coalgebra map to D. | result 0.80 | 0.75 | 0.10 | asserted 0.99 |
| s3 | We conclude by discussing these structures for compositions with bases the vertices of multiplihedra, composihedra, and hypercubes. | contribution 0.88 | 0.85 | 0.15 | asserted 0.65 |
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The paper
Original abstract
We develop the notion of the composition of two coalgebras, which arises naturally in higher category theory and the theory of species. We prove that the composition of two cofree coalgebras is cofree and give conditions which imply that the composition is a one-sided Hopf algebra. These conditions hold when one coalgebra is a graded Hopf operad D and the other is a connected graded coalgebra with coalgebra map to D. We conclude by discussing these structures for compositions with bases the vertices of multiplihedra, composihedra, and hypercubes.
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Papers whose main result relates to this one's
States the same result 1 paper
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We prove that the composition of two cofree coalgebras is again cofree, and we give sufficient conditions that ensure the composition is a one-sided Hopf algebra.
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Our graded Hopf operads differ from those of [ref] , who defined a Hopf operad to be an operad of level coalgebras, where each component $_n$ is a coalgebra.
Operads, homotopy algebra and iterated integrals for double loop spaces · Operads and operad modules · 0.99
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