Editing Jet bundle (section)

==Remark==
This article has defined jets of local sections of a bundle, but it is possible to define jets of functions ''f: M'' → ''N'', where ''M'' and ''N'' are manifolds; the jet of ''f'' then just corresponds to the jet of the section

:''gr<sub>f</sub>: M'' → ''M'' × ''N''
:''gr<sub>f</sub>(p)'' = ''(p, f(p))''

(''gr<sub>f</sub>'' is known as the '''graph of the function ''f''''') of the trivial bundle (''M'' × ''N'', π<sub>1</sub>, ''M''). However, this restriction does not simplify the theory, as the global triviality of π does not imply the global triviality of π<sub>1</sub>.