I had a similar problem: I needed a good looking argmin with wide tilde on top. I settled on $\stackrel{\resizebox{6mm}{1mm}{$\ \sim$}}{\argmin}$. Result: Note: the 3rd argument of \resizebox is interpreted as text mode, so you need to put in the $ signs explicitly. The extra space (\ ) before the tilde (\sim) is a hack to make it look centered.

2019年1月22日 · This question asked how to generate a larger tilde over a particular wide character (a mathcal W), presumably with the motivation of making the tilde look better matched in size with this large glyph. The answer by Ant provides a couple of methods, which look good for wide characters but bad for narrow ones.

2012年8月9日 · Please suggest me a way to put tilde over a symbol phi. I can easily put it over a letter but coming to the case of symbols, it is giving problems. Thanks in advance.

Note, however, that in this implementation the tilde height is entirely independent of the size of the original W, so you may need to define several versions if you want to do this to lots of different letters.

In particular, the discussion notes that \~{} and \textasciitilde produce a raised tilde, whilst the math-mode $\sim$ and \texttildelow are options for a lower tilde; the latter is in the textcomp package, and looks best in fonts other than Computer Modern. If you are typesetting file names or urls, the document recommends the url package.

2011年5月29日 · I am able to produce a standard length \\sim with a tiny S above it, but I would like the \\sim tilde to be longer (maybe one and half times as wide as a capital letter). Any tips on how to change the

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@hmmmm Yes, a little wedge at the end. As a mathematician, I would prefer Fourier transforms or series written with a hat or wedge (or check) at the end of the expression, if the expression is long, because otherwise the symbol looks too big to me. –

2013年2月26日 · For anyone that cares, the bold tilde generated by the first code block of this answer does appear pixelated under zoom in my PDF output (while other symbols do not). Nonetheless, a very helpful answer. –

2017年4月13日 · @DavidCarlisle: It's not just the question title. The body clearly just talks about how to inserting the tilde, which makes it a 100% duplicate. It needs to be rephrased to include the shifting requirement. Then it would make a good follow-up question. –