In this question a nice custom \widehat is made. The relevant code is below. I wanted to use this code to make a similar one for \widetilde but replacing \widehatsym by \widetildesym does not work. Since I have zero knowledge of the subtleties of tex I am stuck at this point. How does one modify this code to get a \widetilde?



    \[ \fixwidehat{abc} \]




    \[ \fixwidetilde{abc} \]

  • Do you mind telling me the principle behind the ''65 change? – Orn Arnaldsson Nov 25 '16 at 20:24
  • 2
    The "62 and "65 are character codes (hex). I just looked them up by running a grep command for widetilde on the whole LaTeX distribution. But they can also be found in The TeXbook, page 432. – Pieter van Oostrum Nov 25 '16 at 22:11

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