When reading a set theorem, there is a part that:
- Defined a sequence $S_{n}$.
- Let $N = \inf\{n:S_{n}=0\}$ and let $X_{n} = S_{N \land n}$
I could not understand the operation $ \land$ in $S_{N \land n}$. Is this "and" operation? If it's true so what is it meaning of $S_{N \land n}$?
I hope someone can explain it to me. Thank you very much.