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单词 Coalgebra
释义

coalgebra


A coalgebra is a vector spaceMathworldPlanetmath A over a field 𝕂 with a 𝕂-linear map Δ:AAA,called the comultiplication,and a (non-zero) 𝕂-linear map ε:A𝕂,called the counit, such that

(Δid)Δ=(idΔ)Δ(coassociativity),
(εid)Δ=id=(idε)Δ.

In of commutative diagramsMathworldPlanetmath:

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更新时间:2025/5/5 1:57:59