I'd like to write
e^x in LaTeX math mode where the
e is written upright, rather than slanted, to indicate that it is not a variable. Kopka and Daly (4ed) pg. 285 do this with
\me^x. When I try this I get the "undefined control sequence" error.
\me a deprecated command?
Q: How can I do now what
\me used to do?