Questions tagged [combinatorial-species]

For questions concerning the theory and applications of combinatorial species, the endofunctors of the category of finite sets and bijections, and the calculus thereof.

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Testing combinatorial species for isomorphism

Given a system of species equations that specifies two species, is there an algorithm to test if they are isomorphic? Testing for isomorphism can be done by testing the equality of the coefficients ...
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Combinatorial Reasoning For Identity of Species

Given a combinatorial species $\mathcal{X},$ let $\mathcal{X}^{\bullet}$ be the pointing species that distinguishes a certain element (e.g. if $\mathcal{X}$ were the species of trees then $\mathcal{X}^...