• The Colimit. The set $\text{CoEq}\webleft (f,g\webright )$ defined by
    \[ \text{CoEq}\webleft (f,g\webright )\mathrel {\smash {\overset {\mathclap {\scriptscriptstyle \text{def}}}=}}B/\mathord {\sim }, \]

    where $\mathord {\sim }$ is the equivalence relation on $B$ generated by $f\webleft (a\webright )\sim g\webleft (a\webright )$.


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