TITLE: What is the correct symbol for "equal-rounded"?
QUESTION [7 upvotes]: What is the correct symbol for saying "equals, but is rounded"? For example:
$$\frac{1}{17}=0.0588$$
Is not essentially correct, since it's rounded. What other equal-like symbol should I use?

REPLY [8 votes]: I use $=$ for equaility, $\approx$ for approximately equal to, and $\doteq$ for correctly rounded to. So
$$\frac{1}{17} = 0.058823529\ldots \qquad \text{and} \qquad \frac{1}{17} \approx 0.06,$$
while
\begin{align*}
\frac{1}{17} &\doteq 0.1 \quad (\text{1 decimal place appears so result is correctly rounded to 1 decimal place})\\
\frac{1}{17} &\doteq 0.06 \quad (\text{2 decimal places appears so result is correctly rounded to 2 decimal places})\\
\frac{1}{17} &\doteq 0.059 \quad (\text{3 decimal places appears so result is correctly rounded to 3 decimal places})\\
\frac{1}{17} &\doteq 0.0588 \quad (\text{4 decimal places appears so result is correctly rounded to 4 decimal places})\\
\frac{1}{17} &\doteq 0.05882 \,\, (\text{5 decimal places appears so result is correctly rounded to 5 decimal places})\\
\end{align*} 
and so on.