From: TP on
Hi everybody,

See here his demonstration:

http://paratribulations.free.fr/help/Jacobian_determination_ORahilly/orahilly_p213.jpg

On p.213, I do not understand how he determines the Jacobian
D(x'y'z')/D(XYZ) from the previous equation, which is an equality between
two differential forms.

Is there anybody here who understands the transition?

Thanks in advance,

Julien