# Save original variable/command for invocation later


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You have to use \let\originalepsilon\epsilon before redefining \epsilon. –  egreg May 27 '13 at 0:04

Thanks egreg, indeed it was \let as was shown by example in this thread http://stackoverflow.com/questions/5845887/how-do-i-use-renewcommand-to-get-back-my-greek-letters which I did not find before.