closefile SciMax Toolbox cnonmet_flag

SciMax Toolbox >> cmetric

cmetric

Maxima Function

Calling Sequence

cmetric (dis)
cmetric()

Description

A function in the ctensor (component tensor) package that computes the metric inverse and sets up the package for further calculations.

If cframe_flag is false, the function computes the inverse metric ug from the (user-defined) matrix lg. The metric determinant is also computed and stored in the variable gdet. Furthermore, the package determines if the metric is diagonal and sets the value of diagmetric accordingly. If the optional argument dis is present and not equal to false, the user is prompted to see the metric inverse.

If cframe_flag is true, the function expects that the values of fri (the inverse frame matrix) and lfg (the frame metric) are defined. From these, the frame matrix fr and the inverse frame metric ufg are computed.

closefile SciMax Toolbox cnonmet_flag