The built-in variables t (for time) and lambda (for eigenvalues) have names that are reserved but that do not turn orange when used as parameter names, for example. That is because you may want to define a parameter or variable for the time t in a stationary study to evaluate expressions using the time t in a model as a fixed value (such as 0).
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The minimum value of the reldetjac variable in each element.
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The suffixes x, y, z, and r in some of the variables are the default names for the spatial coordinates, which you can change if desired.
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r, z
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