I wish to write a wave line above the "ch" as described in the following picture, how should I do this?
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I wish to write a wave line above the "ch" as described in the following picture, how should I do this?
\) or a tilde (~) into LaTeX?](http://tex.stackexchange.com/q/9363/5764) – Werner Jun 30 '13 at 07:18\tilde{ch}or\widetilde{ch}? – karlkoeller Jun 30 '13 at 07:22$\tilde{\text{ch}}$(with the inclusion ofamsmath). – Werner Jun 30 '13 at 07:23