Difference between ≈, ≃, and ≅ - Mathematics Stack Exchange In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical Operators B
What is the approximate identity? - Mathematics Stack Exchange An approximate identity (in the sense that you've described) is a sequence of operators, usually derived from some "nice" class, that converge to the identity operator in the sense that you described
exponential function - Feynmans Trick for Approximating $e^x . . . And he could approximate small values by performing some mental math to get an accurate approximation to three decimal places For example, approximating $e^ {3 3}$, we have$$e^ {3 3}=e^ {2 3+1}\approx 10e\approx 27 18281\ldots$$But what I am confused is how Feynman knew how to correct for the small errors in his approximation
Approximation of a summation by an integral You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
logarithms - Approximating Logs and Antilogs by hand - Mathematics . . . My main purpose is to approximate the answers of very large and very small results of time consuming calculations Logarithms make that job much easier for me For example, $$\frac {87539319} {1729} \approx 10^ {7 942 - 3 237} = 10^ {4 705} = 5 069*10^4$$ According to Wolfram (Yup, I'm that lazy) the answer is, $50630 0\overline