Roman Symbol

$$\left\lfloor{n}\right\rceil \equiv \cases{ n & for $n\not=0$\cr 1 & for $n=0$.\cr}$$

See also Roman Factorial, Harmonic Logarithm

References

Roman, S. ``The Logarithmic Binomial Formula.'' Amer. Math. Monthly 99, 641-648, 1992.