Saturday, 9 December 2017

definition - What does the term $mathcal O(epsilon^2)$ mean?


In the highest upvoted answer to Where does the $i$ come from in the Schrödinger equation? the author writes the following equation:


$$ U^\dagger U=(\mathbb I+\epsilon^* A^\dagger)(\mathbb I+\epsilon A)=I+\epsilon^*A^\dagger+\epsilon A+\mathcal O(\epsilon^2) $$


What does that last term mean? It looks a lot like the big O notation from asymptotic analysis.




No comments:

Post a Comment

Understanding Stagnation point in pitot fluid

What is stagnation point in fluid mechanics. At the open end of the pitot tube the velocity of the fluid becomes zero.But that should result...