Var` package: ‘sym$’ markup reused in ‘$E$’ functions

For reference, some associated Policy Notes (you don't need to visit these links yet): In a later slide (in another trail section) we'll see how to generate an '$SI$' Real convention variant from a '$E$' "symbolic" function variant and a '$C$' compiled function variant from an '$SI$' Real function variant (safest) or from a '$E$' function variant (depends on the form).

Note also that in the example hex$E$fin$m is a '$E$' symbolic function, not a '$EQ$' symbolic equation:

And a subtle "loophole" policy (to cover some Webel physics library functions that preceded introduction of the '$E$' and '$EQ$' policies): There is more explanation and demonstration of these conventions in these slides from a later trail section: But it's best for now to stay with this trail section (or view them quickly in another tab).