nLab
cobase change
Cobase change is another term for pushout of a morphism:
if
\array{
X &\to & U
\\
\downarrow && \downarrow
\\
Y &\to& Y \sqcup_X U
}
is a pushout square in some category then the morphism is the cobase change or cobase extension of along .
Created on March 31, 2009 08:42:53
by
Urs Schreiber
(134.100.222.156)