In maths, what is meant by Order of magnitude, symbol O .
Orders of magnitude indicate the size of something in powers of ten within a factor of ten. For example;
By "X exceeds Y by n orders of magnitude" is meant that X is at least 10^n but less than 10^(n+1) times greater than Y.
By "X is within n orders of magnitude of Y" is meant X is less than 10^(n+1) but greater than 10^-(n+1) times Y.
If you see an expression like
The O means that there are terms to the third power and higher that are drop.
This is different than order of magnitude.
Separate names with a comma.