Alphabeta Math

Comodules, Matrix Coefficients, and Coalgebra Duality

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1 · Prerequisites
2 · Logical flowchart

3 · Items

Definition

Right comodules, comodule maps, and subcomodules

Definition

The dual convolution algebra and rational modules

Lemma

Kernels, images, quotients, and matrix coefficients of comodules

Lemma

Every comodule element lies in a finite-dimensional subcomodule

Theorem

Right comodules are rational modules over the dual algebra

Theorem

Finite-dimensional algebra-coalgebra duality

Sources