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arXiv 1005.0938math.CT
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关于代数上的余代数

On coalgebras over algebras

Adriana Balan, Alexander Kurz

摘要:

我们扩展巴尔的著名的表征最终的余代数的$Set$ -endofunctor完成其初始代数的Eilenberg-摩尔类别的代数的$Set$ -单子$\mathbf{M}$函子产生的提升。作为应用,我们引入了关于单子$\mathbf{M}$的内函子交换对的概念,并证明了在合理的假设下,其中一个内函子的最终余代数可以作为另一个内函子的初始代数生成的自由代数而得到.

英文摘要:

We extend Barr's well-known characterization of the final coalgebra of a $Set$-endofunctor as the completion of its initial algebra to the Eilenberg-Moore category of algebras for a $Set$-monad $\mathbf{M}$ for functors arising as liftings. As an application we introduce the notion of commuting pair of endofunctors with respect to the monad $\mathbf{M}$ and show that under reasonable assumptions, the final coalgebra of one of the endofunctors involved can be obtained as the free algebra generated by the initial algebra of the other endofunctor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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