q-q-q-q-q-q-q-q-q-q-q-q-q-q-q-q-
\begin{tikzcd}[row sep=tiny]
& B \\
A \arrow[ur] \arrow[dr] & \\
& C
\end{tikzcd}
q-q-q-q-q-q-q-q-q-q-q-q-q-q-q-q-q-
\[\mathop { \to } \limits^{huong} \]
q-q-q-q-q-q-q-q-q-q-q-q-q-
\[\xrightarrow{{\,\,\,\,\,\,\,\,\,\,\,\,\,}}\]
\[\xrightarrow{{\,\,\,\,tuong\,\,\,\,\,\,\,\,\,}}\]
\[\xrightarrow[{tuong}]{}\]
q-q-q-q-q-q-q-q-q-q-q-q-q-
\begin{tikzcd}
A \arrow[r, "\phi" near start, "\psi", "\eta" near end] & B
\end{tikzcd}
\begin{tikzcd}
& A_t \arrow[ldd, "\ " , "\alpha_t "' , "\ " ] \arrow[d, "j_t"] \\
& {\sum\limits_I {{A_i}} } \arrow[ld, "\varphi"] \arrow[d, "f"] \\
A \arrow[r, "g"] & B
\end{tikzcd}
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