= FRT bialgebra
{c}
{title2=$CT_1T_2=T_1T_2C$}
Given an invertible <braiding> $C$ on $V\otimes V$, the universal <bialgebra> coacting on $V$ for which $C$ is a <comodule> map is generated by the matrix coefficients $t_{ij}$. Its <comultiplication> is $\Delta t_{ij}=\sum_k t_{ik}\otimes t_{kj}$. Colinearity gives quadratic relations. Writing $R=\tau C$ turns the relation into the familiar <RTT construction> with the appropriate ordered tensor factors. A <Yang-Baxter R-matrix> supplies a scalar <coquasitriangular structure>.
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