OverscriptBox[R, _]

See also

Explore with Wolfram|Alpha

More things to try:

• 50 digits of sqrt(2)+sqrt(3)
• characteristic polynomial {{4,1},{2,-1}}
• inverse Fourier transform

Cite this as:

Weisstein, Eric W. "OverscriptBox[R, _]." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/R-Bar.html

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